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| /*!
* https://github.com/paulmillr/es6-shim
* @license es6-shim Copyright 2013-2016 by Paul Miller (http://paulmillr.com)
* and contributors, MIT License
* es6-shim: v0.35.4
* see https://github.com/paulmillr/es6-shim/blob/0.35.3/LICENSE
* Details and documentation:
* https://github.com/paulmillr/es6-shim/
*/
// UMD (Universal Module Definition)
// see https://github.com/umdjs/umd/blob/master/returnExports.js
(function (root, factory) {
/*global define */
Iif (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define(factory);
} else Eif (typeof exports === 'object') {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like environments that support module.exports,
// like Node.
module.exports = factory();
} else {
// Browser globals (root is window)
root.returnExports = factory();
}
}(this, function () {
'use strict';
var _apply = Function.call.bind(Function.apply);
var _call = Function.call.bind(Function.call);
var isArray = Array.isArray;
var keys = Object.keys;
var not = function notThunker(func) {
return function notThunk() {
return !_apply(func, this, arguments);
};
};
var throwsError = function (func) {
try {
func();
return false;
} catch (e) {
return true;
}
};
var valueOrFalseIfThrows = function valueOrFalseIfThrows(func) {
try {
return func();
} catch (e) {
return false;
}
};
var isCallableWithoutNew = not(throwsError);
var arePropertyDescriptorsSupported = function () {
// if Object.defineProperty exists but throws, it's IE 8
return !throwsError(function () {
return Object.defineProperty({}, 'x', { get: function () { } }); // eslint-disable-line getter-return
});
};
var supportsDescriptors = !!Object.defineProperty && arePropertyDescriptorsSupported();
var functionsHaveNames = (function foo() {}).name === 'foo';
var _forEach = Function.call.bind(Array.prototype.forEach);
var _reduce = Function.call.bind(Array.prototype.reduce);
var _filter = Function.call.bind(Array.prototype.filter);
var _some = Function.call.bind(Array.prototype.some);
var defineProperty = function (object, name, value, force) {
if (!force && name in object) { return; }
Eif (supportsDescriptors) {
Object.defineProperty(object, name, {
configurable: true,
enumerable: false,
writable: true,
value: value
});
} else {
object[name] = value;
}
};
// Define configurable, writable and non-enumerable props
// if they don’t exist.
var defineProperties = function (object, map, forceOverride) {
_forEach(keys(map), function (name) {
var method = map[name];
defineProperty(object, name, method, !!forceOverride);
});
};
var _toString = Function.call.bind(Object.prototype.toString);
var isCallable = typeof /abc/ === 'function' ? function IsCallableSlow(x) {
// Some old browsers (IE, FF) say that typeof /abc/ === 'function'
return typeof x === 'function' && _toString(x) === '[object Function]';
} : function IsCallableFast(x) { return typeof x === 'function'; };
var Value = {
getter: function (object, name, getter) {
Iif (!supportsDescriptors) {
throw new TypeError('getters require true ES5 support');
}
Object.defineProperty(object, name, {
configurable: true,
enumerable: false,
get: getter
});
},
proxy: function (originalObject, key, targetObject) {
if (!supportsDescriptors) {
throw new TypeError('getters require true ES5 support');
}
var originalDescriptor = Object.getOwnPropertyDescriptor(originalObject, key);
Object.defineProperty(targetObject, key, {
configurable: originalDescriptor.configurable,
enumerable: originalDescriptor.enumerable,
get: function getKey() { return originalObject[key]; },
set: function setKey(value) { originalObject[key] = value; }
});
},
redefine: function (object, property, newValue) {
if (supportsDescriptors) {
var descriptor = Object.getOwnPropertyDescriptor(object, property);
descriptor.value = newValue;
Object.defineProperty(object, property, descriptor);
} else {
object[property] = newValue;
}
},
defineByDescriptor: function (object, property, descriptor) {
if (supportsDescriptors) {
Object.defineProperty(object, property, descriptor);
} else if ('value' in descriptor) {
object[property] = descriptor.value;
}
},
preserveToString: function (target, source) {
Eif (source && isCallable(source.toString)) {
defineProperty(target, 'toString', source.toString.bind(source), true);
}
}
};
// Simple shim for Object.create on ES3 browsers
// (unlike real shim, no attempt to support `prototype === null`)
var create = Object.create || function (prototype, properties) {
var Prototype = function Prototype() {};
Prototype.prototype = prototype;
var object = new Prototype();
if (typeof properties !== 'undefined') {
keys(properties).forEach(function (key) {
Value.defineByDescriptor(object, key, properties[key]);
});
}
return object;
};
var supportsSubclassing = function (C, f) {
Iif (!Object.setPrototypeOf) { return false; /* skip test on IE < 11 */ }
return valueOrFalseIfThrows(function () {
var Sub = function Subclass(arg) {
var o = new C(arg);
Object.setPrototypeOf(o, Subclass.prototype);
return o;
};
Object.setPrototypeOf(Sub, C);
Sub.prototype = create(C.prototype, {
constructor: { value: Sub }
});
return f(Sub);
});
};
var getGlobal = function () {
/* global self, window */
// the only reliable means to get the global object is
// `Function('return this')()`
// However, this causes CSP violations in Chrome apps.
Iif (typeof self !== 'undefined') { return self; }
Iif (typeof window !== 'undefined') { return window; }
Eif (typeof global !== 'undefined') { return global; }
throw new Error('unable to locate global object');
};
var globals = getGlobal();
var globalIsFinite = globals.isFinite;
var _indexOf = Function.call.bind(String.prototype.indexOf);
var _arrayIndexOfApply = Function.apply.bind(Array.prototype.indexOf);
var _concat = Function.call.bind(Array.prototype.concat);
// var _sort = Function.call.bind(Array.prototype.sort);
var _strSlice = Function.call.bind(String.prototype.slice);
var _push = Function.call.bind(Array.prototype.push);
var _pushApply = Function.apply.bind(Array.prototype.push);
var _join = Function.call.bind(Array.prototype.join);
var _shift = Function.call.bind(Array.prototype.shift);
var _max = Math.max;
var _min = Math.min;
var _floor = Math.floor;
var _abs = Math.abs;
var _exp = Math.exp;
var _log = Math.log;
var _sqrt = Math.sqrt;
var _hasOwnProperty = Function.call.bind(Object.prototype.hasOwnProperty);
var ArrayIterator; // make our implementation private
var noop = function () {};
var OrigMap = globals.Map;
var origMapDelete = OrigMap && OrigMap.prototype['delete'];
var origMapGet = OrigMap && OrigMap.prototype.get;
var origMapHas = OrigMap && OrigMap.prototype.has;
var origMapSet = OrigMap && OrigMap.prototype.set;
var Symbol = globals.Symbol || {};
var symbolSpecies = Symbol.species || '@@species';
var numberIsNaN = Number.isNaN || function isNaN(value) {
// NaN !== NaN, but they are identical.
// NaNs are the only non-reflexive value, i.e., if x !== x,
// then x is NaN.
// isNaN is broken: it converts its argument to number, so
// isNaN('foo') => true
return value !== value;
};
var numberIsFinite = Number.isFinite || function isFinite(value) {
return typeof value === 'number' && globalIsFinite(value);
};
var _sign = isCallable(Math.sign) ? Math.sign : function sign(value) {
var number = Number(value);
if (number === 0) { return number; }
if (numberIsNaN(number)) { return number; }
return number < 0 ? -1 : 1;
};
var _log1p = function log1p(value) {
var x = Number(value);
if (x < -1 || numberIsNaN(x)) { return NaN; }
if (x === 0 || x === Infinity) { return x; }
if (x === -1) { return -Infinity; }
return (1 + x) - 1 === 0 ? x : x * (_log(1 + x) / ((1 + x) - 1));
};
// taken directly from https://github.com/ljharb/is-arguments/blob/master/index.js
// can be replaced with require('is-arguments') if we ever use a build process instead
var isStandardArguments = function isArguments(value) {
return _toString(value) === '[object Arguments]';
};
var isLegacyArguments = function isArguments(value) {
return value !== null
&& typeof value === 'object'
&& typeof value.length === 'number'
&& value.length >= 0
&& _toString(value) !== '[object Array]'
&& _toString(value.callee) === '[object Function]';
};
var isArguments = isStandardArguments(arguments) ? isStandardArguments : isLegacyArguments;
var Type = {
primitive: function (x) { return x === null || (typeof x !== 'function' && typeof x !== 'object'); },
string: function (x) { return _toString(x) === '[object String]'; },
regex: function (x) { return _toString(x) === '[object RegExp]'; },
symbol: function (x) {
return typeof globals.Symbol === 'function' && typeof x === 'symbol';
}
};
var overrideNative = function overrideNative(object, property, replacement) {
var original = object[property];
defineProperty(object, property, replacement, true);
Value.preserveToString(object[property], original);
};
// eslint-disable-next-line no-restricted-properties
var hasSymbols = typeof Symbol === 'function' && typeof Symbol['for'] === 'function' && Type.symbol(Symbol());
// This is a private name in the es6 spec, equal to '[Symbol.iterator]'
// we're going to use an arbitrary _-prefixed name to make our shims
// work properly with each other, even though we don't have full Iterator
// support. That is, `Array.from(map.keys())` will work, but we don't
// pretend to export a "real" Iterator interface.
var $iterator$ = Type.symbol(Symbol.iterator) ? Symbol.iterator : '_es6-shim iterator_';
// Firefox ships a partial implementation using the name @@iterator.
// https://bugzilla.mozilla.org/show_bug.cgi?id=907077#c14
// So use that name if we detect it.
Iif (globals.Set && typeof new globals.Set()['@@iterator'] === 'function') {
$iterator$ = '@@iterator';
}
// Reflect
Iif (!globals.Reflect) {
defineProperty(globals, 'Reflect', {}, true);
}
var Reflect = globals.Reflect;
var $String = String;
/* global document */
var domAll = (typeof document === 'undefined' || !document) ? null : document.all;
var isNullOrUndefined = domAll == null ? function isNullOrUndefined(x) {
return x == null;
} : function isNullOrUndefinedAndNotDocumentAll(x) {
return x == null && x !== domAll;
};
var ES = {
// http://www.ecma-international.org/ecma-262/6.0/#sec-call
Call: function Call(F, V) {
var args = arguments.length > 2 ? arguments[2] : [];
if (!ES.IsCallable(F)) {
throw new TypeError(F + ' is not a function');
}
return _apply(F, V, args);
},
RequireObjectCoercible: function (x, optMessage) {
if (isNullOrUndefined(x)) {
throw new TypeError(optMessage || 'Cannot call method on ' + x);
}
return x;
},
// This might miss the "(non-standard exotic and does not implement
// [[Call]])" case from
// http://www.ecma-international.org/ecma-262/6.0/#sec-typeof-operator-runtime-semantics-evaluation
// but we can't find any evidence these objects exist in practice.
// If we find some in the future, you could test `Object(x) === x`,
// which is reliable according to
// http://www.ecma-international.org/ecma-262/6.0/#sec-toobject
// but is not well optimized by runtimes and creates an object
// whenever it returns false, and thus is very slow.
TypeIsObject: function (x) {
if (x === void 0 || x === null || x === true || x === false) {
return false;
}
return typeof x === 'function' || typeof x === 'object' || x === domAll;
},
ToObject: function (o, optMessage) {
return Object(ES.RequireObjectCoercible(o, optMessage));
},
IsCallable: isCallable,
IsConstructor: function (x) {
// We can't tell callables from constructors in ES5
return ES.IsCallable(x);
},
ToInt32: function (x) {
return ES.ToNumber(x) >> 0;
},
ToUint32: function (x) {
return ES.ToNumber(x) >>> 0;
},
ToNumber: function (value) {
if (hasSymbols && _toString(value) === '[object Symbol]') {
throw new TypeError('Cannot convert a Symbol value to a number');
}
return +value;
},
ToInteger: function (value) {
var number = ES.ToNumber(value);
if (numberIsNaN(number)) { return 0; }
if (number === 0 || !numberIsFinite(number)) { return number; }
return (number > 0 ? 1 : -1) * _floor(_abs(number));
},
ToLength: function (value) {
var len = ES.ToInteger(value);
if (len <= 0) { return 0; } // includes converting -0 to +0
if (len > Number.MAX_SAFE_INTEGER) { return Number.MAX_SAFE_INTEGER; }
return len;
},
SameValue: function (a, b) {
if (a === b) {
// 0 === -0, but they are not identical.
if (a === 0) { return 1 / a === 1 / b; }
return true;
}
return numberIsNaN(a) && numberIsNaN(b);
},
SameValueZero: function (a, b) {
// same as SameValue except for SameValueZero(+0, -0) == true
return (a === b) || (numberIsNaN(a) && numberIsNaN(b));
},
GetIterator: function (o) {
if (isArguments(o)) {
// special case support for `arguments`
return new ArrayIterator(o, 'value');
}
var itFn = ES.GetMethod(o, $iterator$);
if (!ES.IsCallable(itFn)) {
// Better diagnostics if itFn is null or undefined
throw new TypeError('value is not an iterable');
}
var it = ES.Call(itFn, o);
if (!ES.TypeIsObject(it)) {
throw new TypeError('bad iterator');
}
return it;
},
GetMethod: function (o, p) {
var func = ES.ToObject(o)[p];
if (isNullOrUndefined(func)) {
return void 0;
}
if (!ES.IsCallable(func)) {
throw new TypeError('Method not callable: ' + p);
}
return func;
},
IteratorComplete: function (iterResult) {
return !!iterResult.done;
},
IteratorClose: function (iterator, completionIsThrow) {
var returnMethod = ES.GetMethod(iterator, 'return');
if (returnMethod === void 0) {
return;
}
var innerResult, innerException;
try {
innerResult = ES.Call(returnMethod, iterator);
} catch (e) {
innerException = e;
}
if (completionIsThrow) {
return;
}
if (innerException) {
throw innerException;
}
if (!ES.TypeIsObject(innerResult)) {
throw new TypeError("Iterator's return method returned a non-object.");
}
},
IteratorNext: function (it) {
var result = arguments.length > 1 ? it.next(arguments[1]) : it.next();
if (!ES.TypeIsObject(result)) {
throw new TypeError('bad iterator');
}
return result;
},
IteratorStep: function (it) {
var result = ES.IteratorNext(it);
var done = ES.IteratorComplete(result);
return done ? false : result;
},
Construct: function (C, args, newTarget, isES6internal) {
var target = typeof newTarget === 'undefined' ? C : newTarget;
if (!isES6internal && Reflect.construct) {
// Try to use Reflect.construct if available
return Reflect.construct(C, args, target);
}
// OK, we have to fake it. This will only work if the
// C.[[ConstructorKind]] == "base" -- but that's the only
// kind we can make in ES5 code anyway.
// OrdinaryCreateFromConstructor(target, "%ObjectPrototype%")
var proto = target.prototype;
if (!ES.TypeIsObject(proto)) {
proto = Object.prototype;
}
var obj = create(proto);
// Call the constructor.
var result = ES.Call(C, obj, args);
return ES.TypeIsObject(result) ? result : obj;
},
SpeciesConstructor: function (O, defaultConstructor) {
var C = O.constructor;
if (C === void 0) {
return defaultConstructor;
}
if (!ES.TypeIsObject(C)) {
throw new TypeError('Bad constructor');
}
var S = C[symbolSpecies];
if (isNullOrUndefined(S)) {
return defaultConstructor;
}
if (!ES.IsConstructor(S)) {
throw new TypeError('Bad @@species');
}
return S;
},
CreateHTML: function (string, tag, attribute, value) {
var S = ES.ToString(string);
var p1 = '<' + tag;
if (attribute !== '') {
var V = ES.ToString(value);
var escapedV = V.replace(/"/g, '"');
p1 += ' ' + attribute + '="' + escapedV + '"';
}
var p2 = p1 + '>';
var p3 = p2 + S;
return p3 + '</' + tag + '>';
},
IsRegExp: function IsRegExp(argument) {
if (!ES.TypeIsObject(argument)) {
return false;
}
var isRegExp = argument[Symbol.match];
if (typeof isRegExp !== 'undefined') {
return !!isRegExp;
}
return Type.regex(argument);
},
ToString: function ToString(string) {
if (hasSymbols && _toString(string) === '[object Symbol]') {
throw new TypeError('Cannot convert a Symbol value to a number');
}
return $String(string);
}
};
// Well-known Symbol shims
Eif (supportsDescriptors && hasSymbols) {
var defineWellKnownSymbol = function defineWellKnownSymbol(name) {
if (Type.symbol(Symbol[name])) {
return Symbol[name];
}
// eslint-disable-next-line no-restricted-properties
var sym = Symbol['for']('Symbol.' + name);
Object.defineProperty(Symbol, name, {
configurable: false,
enumerable: false,
writable: false,
value: sym
});
return sym;
};
Iif (!Type.symbol(Symbol.search)) {
var symbolSearch = defineWellKnownSymbol('search');
var originalSearch = String.prototype.search;
defineProperty(RegExp.prototype, symbolSearch, function search(string) {
return ES.Call(originalSearch, string, [this]);
});
var searchShim = function search(regexp) {
var O = ES.RequireObjectCoercible(this);
if (!isNullOrUndefined(regexp)) {
var searcher = ES.GetMethod(regexp, symbolSearch);
if (typeof searcher !== 'undefined') {
return ES.Call(searcher, regexp, [O]);
}
}
return ES.Call(originalSearch, O, [ES.ToString(regexp)]);
};
overrideNative(String.prototype, 'search', searchShim);
}
Iif (!Type.symbol(Symbol.replace)) {
var symbolReplace = defineWellKnownSymbol('replace');
var originalReplace = String.prototype.replace;
defineProperty(RegExp.prototype, symbolReplace, function replace(string, replaceValue) {
return ES.Call(originalReplace, string, [this, replaceValue]);
});
var replaceShim = function replace(searchValue, replaceValue) {
var O = ES.RequireObjectCoercible(this);
if (!isNullOrUndefined(searchValue)) {
var replacer = ES.GetMethod(searchValue, symbolReplace);
if (typeof replacer !== 'undefined') {
return ES.Call(replacer, searchValue, [O, replaceValue]);
}
}
return ES.Call(originalReplace, O, [ES.ToString(searchValue), replaceValue]);
};
overrideNative(String.prototype, 'replace', replaceShim);
}
Iif (!Type.symbol(Symbol.split)) {
var symbolSplit = defineWellKnownSymbol('split');
var originalSplit = String.prototype.split;
defineProperty(RegExp.prototype, symbolSplit, function split(string, limit) {
return ES.Call(originalSplit, string, [this, limit]);
});
var splitShim = function split(separator, limit) {
var O = ES.RequireObjectCoercible(this);
if (!isNullOrUndefined(separator)) {
var splitter = ES.GetMethod(separator, symbolSplit);
if (typeof splitter !== 'undefined') {
return ES.Call(splitter, separator, [O, limit]);
}
}
return ES.Call(originalSplit, O, [ES.ToString(separator), limit]);
};
overrideNative(String.prototype, 'split', splitShim);
}
var symbolMatchExists = Type.symbol(Symbol.match);
var stringMatchIgnoresSymbolMatch = symbolMatchExists && (function () {
// Firefox 41, through Nightly 45 has Symbol.match, but String#match ignores it.
// Firefox 40 and below have Symbol.match but String#match works fine.
var o = {};
o[Symbol.match] = function () { return 42; };
return 'a'.match(o) !== 42;
}());
Iif (!symbolMatchExists || stringMatchIgnoresSymbolMatch) {
var symbolMatch = defineWellKnownSymbol('match');
var originalMatch = String.prototype.match;
defineProperty(RegExp.prototype, symbolMatch, function match(string) {
return ES.Call(originalMatch, string, [this]);
});
var matchShim = function match(regexp) {
var O = ES.RequireObjectCoercible(this);
if (!isNullOrUndefined(regexp)) {
var matcher = ES.GetMethod(regexp, symbolMatch);
if (typeof matcher !== 'undefined') {
return ES.Call(matcher, regexp, [O]);
}
}
return ES.Call(originalMatch, O, [ES.ToString(regexp)]);
};
overrideNative(String.prototype, 'match', matchShim);
}
}
var wrapConstructor = function wrapConstructor(original, replacement, keysToSkip) {
Value.preserveToString(replacement, original);
if (Object.setPrototypeOf) {
// sets up proper prototype chain where possible
Object.setPrototypeOf(original, replacement);
}
if (supportsDescriptors) {
_forEach(Object.getOwnPropertyNames(original), function (key) {
if (key in noop || keysToSkip[key]) { return; }
Value.proxy(original, key, replacement);
});
} else {
_forEach(Object.keys(original), function (key) {
if (key in noop || keysToSkip[key]) { return; }
replacement[key] = original[key];
});
}
replacement.prototype = original.prototype;
Value.redefine(original.prototype, 'constructor', replacement);
};
var defaultSpeciesGetter = function () { return this; };
var addDefaultSpecies = function (C) {
Iif (supportsDescriptors && !_hasOwnProperty(C, symbolSpecies)) {
Value.getter(C, symbolSpecies, defaultSpeciesGetter);
}
};
var addIterator = function (prototype, impl) {
var implementation = impl || function iterator() { return this; };
defineProperty(prototype, $iterator$, implementation);
Iif (!prototype[$iterator$] && Type.symbol($iterator$)) {
// implementations are buggy when $iterator$ is a Symbol
prototype[$iterator$] = implementation;
}
};
var createDataProperty = function createDataProperty(object, name, value) {
if (supportsDescriptors) {
Object.defineProperty(object, name, {
configurable: true,
enumerable: true,
writable: true,
value: value
});
} else {
object[name] = value;
}
};
var createDataPropertyOrThrow = function createDataPropertyOrThrow(object, name, value) {
createDataProperty(object, name, value);
if (!ES.SameValue(object[name], value)) {
throw new TypeError('property is nonconfigurable');
}
};
var emulateES6construct = function (o, defaultNewTarget, defaultProto, slots) {
// This is an es5 approximation to es6 construct semantics. in es6,
// 'new Foo' invokes Foo.[[Construct]] which (for almost all objects)
// just sets the internal variable NewTarget (in es6 syntax `new.target`)
// to Foo and then returns Foo().
// Many ES6 object then have constructors of the form:
// 1. If NewTarget is undefined, throw a TypeError exception
// 2. Let xxx by OrdinaryCreateFromConstructor(NewTarget, yyy, zzz)
// So we're going to emulate those first two steps.
Iif (!ES.TypeIsObject(o)) {
throw new TypeError('Constructor requires `new`: ' + defaultNewTarget.name);
}
var proto = defaultNewTarget.prototype;
Iif (!ES.TypeIsObject(proto)) {
proto = defaultProto;
}
var obj = create(proto);
for (var name in slots) {
Eif (_hasOwnProperty(slots, name)) {
var value = slots[name];
defineProperty(obj, name, value, true);
}
}
return obj;
};
// Firefox 31 reports this function's length as 0
// https://bugzilla.mozilla.org/show_bug.cgi?id=1062484
Iif (String.fromCodePoint && String.fromCodePoint.length !== 1) {
var originalFromCodePoint = String.fromCodePoint;
overrideNative(String, 'fromCodePoint', function fromCodePoint(codePoints) {
return ES.Call(originalFromCodePoint, this, arguments);
});
}
var StringShims = {
fromCodePoint: function fromCodePoint(codePoints) {
var result = [];
var next;
for (var i = 0, length = arguments.length; i < length; i++) {
next = Number(arguments[i]);
if (!ES.SameValue(next, ES.ToInteger(next)) || next < 0 || next > 0x10FFFF) {
throw new RangeError('Invalid code point ' + next);
}
if (next < 0x10000) {
_push(result, String.fromCharCode(next));
} else {
next -= 0x10000;
_push(result, String.fromCharCode((next >> 10) + 0xD800));
_push(result, String.fromCharCode((next % 0x400) + 0xDC00));
}
}
return _join(result, '');
},
raw: function raw(template) {
var numberOfSubstitutions = arguments.length - 1;
var cooked = ES.ToObject(template, 'bad template');
var raw = ES.ToObject(cooked.raw, 'bad raw value');
var len = raw.length;
var literalSegments = ES.ToLength(len);
if (literalSegments <= 0) {
return '';
}
var stringElements = [];
var nextIndex = 0;
var nextKey, next, nextSeg, nextSub;
while (nextIndex < literalSegments) {
nextKey = ES.ToString(nextIndex);
nextSeg = ES.ToString(raw[nextKey]);
_push(stringElements, nextSeg);
if (nextIndex + 1 >= literalSegments) {
break;
}
next = nextIndex + 1 < arguments.length ? arguments[nextIndex + 1] : '';
nextSub = ES.ToString(next);
_push(stringElements, nextSub);
nextIndex += 1;
}
return _join(stringElements, '');
}
};
Iif (String.raw && String.raw({ raw: { 0: 'x', 1: 'y', length: 2 } }) !== 'xy') {
// IE 11 TP has a broken String.raw implementation
overrideNative(String, 'raw', StringShims.raw);
}
defineProperties(String, StringShims);
// Fast repeat, uses the `Exponentiation by squaring` algorithm.
// Perf: http://jsperf.com/string-repeat2/2
var stringRepeat = function repeat(s, times) {
if (times < 1) { return ''; }
if (times % 2) { return repeat(s, times - 1) + s; }
var half = repeat(s, times / 2);
return half + half;
};
var stringMaxLength = Infinity;
var StringPrototypeShims = {
repeat: function repeat(times) {
var thisStr = ES.ToString(ES.RequireObjectCoercible(this));
var numTimes = ES.ToInteger(times);
if (numTimes < 0 || numTimes >= stringMaxLength) {
throw new RangeError('repeat count must be less than infinity and not overflow maximum string size');
}
return stringRepeat(thisStr, numTimes);
},
startsWith: function startsWith(searchString) {
var S = ES.ToString(ES.RequireObjectCoercible(this));
if (ES.IsRegExp(searchString)) {
throw new TypeError('Cannot call method "startsWith" with a regex');
}
var searchStr = ES.ToString(searchString);
var position;
if (arguments.length > 1) {
position = arguments[1];
}
var start = _max(ES.ToInteger(position), 0);
return _strSlice(S, start, start + searchStr.length) === searchStr;
},
endsWith: function endsWith(searchString) {
var S = ES.ToString(ES.RequireObjectCoercible(this));
if (ES.IsRegExp(searchString)) {
throw new TypeError('Cannot call method "endsWith" with a regex');
}
var searchStr = ES.ToString(searchString);
var len = S.length;
var endPosition;
if (arguments.length > 1) {
endPosition = arguments[1];
}
var pos = typeof endPosition === 'undefined' ? len : ES.ToInteger(endPosition);
var end = _min(_max(pos, 0), len);
return _strSlice(S, end - searchStr.length, end) === searchStr;
},
includes: function includes(searchString) {
if (ES.IsRegExp(searchString)) {
throw new TypeError('"includes" does not accept a RegExp');
}
var searchStr = ES.ToString(searchString);
var position;
if (arguments.length > 1) {
position = arguments[1];
}
// Somehow this trick makes method 100% compat with the spec.
return _indexOf(this, searchStr, position) !== -1;
},
codePointAt: function codePointAt(pos) {
var thisStr = ES.ToString(ES.RequireObjectCoercible(this));
var position = ES.ToInteger(pos);
var length = thisStr.length;
if (position >= 0 && position < length) {
var first = thisStr.charCodeAt(position);
var isEnd = position + 1 === length;
if (first < 0xD800 || first > 0xDBFF || isEnd) { return first; }
var second = thisStr.charCodeAt(position + 1);
if (second < 0xDC00 || second > 0xDFFF) { return first; }
return ((first - 0xD800) * 1024) + (second - 0xDC00) + 0x10000;
}
}
};
Iif (String.prototype.includes && 'a'.includes('a', Infinity) !== false) {
overrideNative(String.prototype, 'includes', StringPrototypeShims.includes);
}
Eif (String.prototype.startsWith && String.prototype.endsWith) {
var startsWithRejectsRegex = throwsError(function () {
/* throws if spec-compliant */
return '/a/'.startsWith(/a/);
});
var startsWithHandlesInfinity = valueOrFalseIfThrows(function () {
return 'abc'.startsWith('a', Infinity) === false;
});
Iif (!startsWithRejectsRegex || !startsWithHandlesInfinity) {
// Firefox (< 37?) and IE 11 TP have a noncompliant startsWith implementation
overrideNative(String.prototype, 'startsWith', StringPrototypeShims.startsWith);
overrideNative(String.prototype, 'endsWith', StringPrototypeShims.endsWith);
}
}
Eif (hasSymbols) {
var startsWithSupportsSymbolMatch = valueOrFalseIfThrows(function () {
var re = /a/;
re[Symbol.match] = false;
return '/a/'.startsWith(re);
});
Iif (!startsWithSupportsSymbolMatch) {
overrideNative(String.prototype, 'startsWith', StringPrototypeShims.startsWith);
}
var endsWithSupportsSymbolMatch = valueOrFalseIfThrows(function () {
var re = /a/;
re[Symbol.match] = false;
return '/a/'.endsWith(re);
});
Iif (!endsWithSupportsSymbolMatch) {
overrideNative(String.prototype, 'endsWith', StringPrototypeShims.endsWith);
}
var includesSupportsSymbolMatch = valueOrFalseIfThrows(function () {
var re = /a/;
re[Symbol.match] = false;
return '/a/'.includes(re);
});
Iif (!includesSupportsSymbolMatch) {
overrideNative(String.prototype, 'includes', StringPrototypeShims.includes);
}
}
defineProperties(String.prototype, StringPrototypeShims);
// whitespace from: http://es5.github.io/#x15.5.4.20
// implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324
var ws = [
'\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003',
'\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028',
'\u2029\uFEFF'
].join('');
var trimRegexp = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');
var trimShim = function trim() {
return ES.ToString(ES.RequireObjectCoercible(this)).replace(trimRegexp, '');
};
var nonWS = ['\u0085', '\u200b', '\ufffe'].join('');
var nonWSregex = new RegExp('[' + nonWS + ']', 'g');
var isBadHexRegex = /^[-+]0x[0-9a-f]+$/i;
var hasStringTrimBug = nonWS.trim().length !== nonWS.length;
defineProperty(String.prototype, 'trim', trimShim, hasStringTrimBug);
// Given an argument x, it will return an IteratorResult object,
// with value set to x and done to false.
// Given no arguments, it will return an iterator completion object.
var iteratorResult = function (x) {
return { value: x, done: arguments.length === 0 };
};
// see http://www.ecma-international.org/ecma-262/6.0/#sec-string.prototype-@@iterator
var StringIterator = function (s) {
ES.RequireObjectCoercible(s);
defineProperty(this, '_s', ES.ToString(s));
defineProperty(this, '_i', 0);
};
StringIterator.prototype.next = function () {
var s = this._s;
var i = this._i;
if (typeof s === 'undefined' || i >= s.length) {
this._s = void 0;
return iteratorResult();
}
var first = s.charCodeAt(i);
var second, len;
if (first < 0xD800 || first > 0xDBFF || (i + 1) === s.length) {
len = 1;
} else {
second = s.charCodeAt(i + 1);
len = (second < 0xDC00 || second > 0xDFFF) ? 1 : 2;
}
this._i = i + len;
return iteratorResult(s.substr(i, len));
};
addIterator(StringIterator.prototype);
addIterator(String.prototype, function () {
return new StringIterator(this);
});
var ArrayShims = {
from: function from(items) {
var C = this;
var mapFn;
if (arguments.length > 1) {
mapFn = arguments[1];
}
var mapping, T;
if (typeof mapFn === 'undefined') {
mapping = false;
} else {
if (!ES.IsCallable(mapFn)) {
throw new TypeError('Array.from: when provided, the second argument must be a function');
}
if (arguments.length > 2) {
T = arguments[2];
}
mapping = true;
}
// Note that that Arrays will use ArrayIterator:
// https://bugs.ecmascript.org/show_bug.cgi?id=2416
var usingIterator = typeof (isArguments(items) || ES.GetMethod(items, $iterator$)) !== 'undefined';
var length, result, i;
if (usingIterator) {
result = ES.IsConstructor(C) ? Object(new C()) : [];
var iterator = ES.GetIterator(items);
var next, nextValue;
i = 0;
while (true) {
next = ES.IteratorStep(iterator);
if (next === false) {
break;
}
nextValue = next.value;
try {
if (mapping) {
nextValue = typeof T === 'undefined' ? mapFn(nextValue, i) : _call(mapFn, T, nextValue, i);
}
result[i] = nextValue;
} catch (e) {
ES.IteratorClose(iterator, true);
throw e;
}
i += 1;
}
length = i;
} else {
var arrayLike = ES.ToObject(items);
length = ES.ToLength(arrayLike.length);
result = ES.IsConstructor(C) ? Object(new C(length)) : new Array(length);
var value;
for (i = 0; i < length; ++i) {
value = arrayLike[i];
if (mapping) {
value = typeof T === 'undefined' ? mapFn(value, i) : _call(mapFn, T, value, i);
}
createDataPropertyOrThrow(result, i, value);
}
}
result.length = length;
return result;
},
of: function of() {
var len = arguments.length;
var C = this;
var A = isArray(C) || !ES.IsCallable(C) ? new Array(len) : ES.Construct(C, [len]);
for (var k = 0; k < len; ++k) {
createDataPropertyOrThrow(A, k, arguments[k]);
}
A.length = len;
return A;
}
};
defineProperties(Array, ArrayShims);
addDefaultSpecies(Array);
// Our ArrayIterator is private; see
// https://github.com/paulmillr/es6-shim/issues/252
ArrayIterator = function (array, kind) {
defineProperty(this, 'i', 0);
defineProperty(this, 'array', array);
defineProperty(this, 'kind', kind);
};
defineProperties(ArrayIterator.prototype, {
next: function () {
var i = this.i;
var array = this.array;
if (!(this instanceof ArrayIterator)) {
throw new TypeError('Not an ArrayIterator');
}
if (typeof array !== 'undefined') {
var len = ES.ToLength(array.length);
if (i < len) {
//for (; i < len; i++) {
var kind = this.kind;
var retval;
if (kind === 'key') {
retval = i;
} else if (kind === 'value') {
retval = array[i];
} else if (kind === 'entry') {
retval = [i, array[i]];
}
this.i = i + 1;
return iteratorResult(retval);
}
}
this.array = void 0;
return iteratorResult();
}
});
addIterator(ArrayIterator.prototype);
/*
var orderKeys = function orderKeys(a, b) {
var aNumeric = String(ES.ToInteger(a)) === a;
var bNumeric = String(ES.ToInteger(b)) === b;
if (aNumeric && bNumeric) {
return b - a;
} else if (aNumeric && !bNumeric) {
return -1;
} else if (!aNumeric && bNumeric) {
return 1;
} else {
return a.localeCompare(b);
}
};
var getAllKeys = function getAllKeys(object) {
var ownKeys = [];
var keys = [];
for (var key in object) {
_push(_hasOwnProperty(object, key) ? ownKeys : keys, key);
}
_sort(ownKeys, orderKeys);
_sort(keys, orderKeys);
return _concat(ownKeys, keys);
};
*/
// note: this is positioned here because it depends on ArrayIterator
var arrayOfSupportsSubclassing = Array.of === ArrayShims.of || (function () {
// Detects a bug in Webkit nightly r181886
var Foo = function Foo(len) { this.length = len; };
Foo.prototype = [];
var fooArr = Array.of.apply(Foo, [1, 2]);
return fooArr instanceof Foo && fooArr.length === 2;
}());
Iif (!arrayOfSupportsSubclassing) {
overrideNative(Array, 'of', ArrayShims.of);
}
var ArrayPrototypeShims = {
copyWithin: function copyWithin(target, start) {
var o = ES.ToObject(this);
var len = ES.ToLength(o.length);
var relativeTarget = ES.ToInteger(target);
var relativeStart = ES.ToInteger(start);
var to = relativeTarget < 0 ? _max(len + relativeTarget, 0) : _min(relativeTarget, len);
var from = relativeStart < 0 ? _max(len + relativeStart, 0) : _min(relativeStart, len);
var end;
if (arguments.length > 2) {
end = arguments[2];
}
var relativeEnd = typeof end === 'undefined' ? len : ES.ToInteger(end);
var finalItem = relativeEnd < 0 ? _max(len + relativeEnd, 0) : _min(relativeEnd, len);
var count = _min(finalItem - from, len - to);
var direction = 1;
if (from < to && to < (from + count)) {
direction = -1;
from += count - 1;
to += count - 1;
}
while (count > 0) {
if (from in o) {
o[to] = o[from];
} else {
delete o[to];
}
from += direction;
to += direction;
count -= 1;
}
return o;
},
fill: function fill(value) {
var start;
if (arguments.length > 1) {
start = arguments[1];
}
var end;
if (arguments.length > 2) {
end = arguments[2];
}
var O = ES.ToObject(this);
var len = ES.ToLength(O.length);
start = ES.ToInteger(typeof start === 'undefined' ? 0 : start);
end = ES.ToInteger(typeof end === 'undefined' ? len : end);
var relativeStart = start < 0 ? _max(len + start, 0) : _min(start, len);
var relativeEnd = end < 0 ? len + end : end;
for (var i = relativeStart; i < len && i < relativeEnd; ++i) {
O[i] = value;
}
return O;
},
find: function find(predicate) {
var list = ES.ToObject(this);
var length = ES.ToLength(list.length);
if (!ES.IsCallable(predicate)) {
throw new TypeError('Array#find: predicate must be a function');
}
var thisArg = arguments.length > 1 ? arguments[1] : null;
for (var i = 0, value; i < length; i++) {
value = list[i];
if (thisArg) {
if (_call(predicate, thisArg, value, i, list)) {
return value;
}
} else if (predicate(value, i, list)) {
return value;
}
}
},
findIndex: function findIndex(predicate) {
var list = ES.ToObject(this);
var length = ES.ToLength(list.length);
if (!ES.IsCallable(predicate)) {
throw new TypeError('Array#findIndex: predicate must be a function');
}
var thisArg = arguments.length > 1 ? arguments[1] : null;
for (var i = 0; i < length; i++) {
if (thisArg) {
if (_call(predicate, thisArg, list[i], i, list)) {
return i;
}
} else if (predicate(list[i], i, list)) {
return i;
}
}
return -1;
},
keys: function keys() {
return new ArrayIterator(this, 'key');
},
values: function values() {
return new ArrayIterator(this, 'value');
},
entries: function entries() {
return new ArrayIterator(this, 'entry');
}
};
// Safari 7.1 defines Array#keys and Array#entries natively,
// but the resulting ArrayIterator objects don't have a "next" method.
Iif (Array.prototype.keys && !ES.IsCallable([1].keys().next)) {
delete Array.prototype.keys;
}
Iif (Array.prototype.entries && !ES.IsCallable([1].entries().next)) {
delete Array.prototype.entries;
}
// Chrome 38 defines Array#keys and Array#entries, and Array#@@iterator, but not Array#values
Iif (Array.prototype.keys && Array.prototype.entries && !Array.prototype.values && Array.prototype[$iterator$]) {
defineProperties(Array.prototype, {
values: Array.prototype[$iterator$]
});
if (Type.symbol(Symbol.unscopables)) {
Array.prototype[Symbol.unscopables].values = true;
}
}
// Chrome 40 defines Array#values with the incorrect name, although Array#{keys,entries} have the correct name
Iif (functionsHaveNames && Array.prototype.values && Array.prototype.values.name !== 'values') {
var originalArrayPrototypeValues = Array.prototype.values;
overrideNative(Array.prototype, 'values', function values() { return ES.Call(originalArrayPrototypeValues, this, arguments); });
defineProperty(Array.prototype, $iterator$, Array.prototype.values, true);
}
defineProperties(Array.prototype, ArrayPrototypeShims);
Iif (1 / [true].indexOf(true, -0) < 0) {
// indexOf when given a position arg of -0 should return +0.
// https://github.com/tc39/ecma262/pull/316
defineProperty(Array.prototype, 'indexOf', function indexOf(searchElement) {
var value = _arrayIndexOfApply(this, arguments);
if (value === 0 && (1 / value) < 0) {
return 0;
}
return value;
}, true);
}
addIterator(Array.prototype, function () { return this.values(); });
// Chrome defines keys/values/entries on Array, but doesn't give us
// any way to identify its iterator. So add our own shimmed field.
Eif (Object.getPrototypeOf) {
var ChromeArrayIterator = Object.getPrototypeOf([].values());
Eif (ChromeArrayIterator) { // in WSH, this is `undefined`
addIterator(ChromeArrayIterator);
}
}
// note: this is positioned here because it relies on Array#entries
var arrayFromSwallowsNegativeLengths = (function () {
// Detects a Firefox bug in v32
// https://bugzilla.mozilla.org/show_bug.cgi?id=1063993
return valueOrFalseIfThrows(function () {
return Array.from({ length: -1 }).length === 0;
});
}());
var arrayFromHandlesIterables = (function () {
// Detects a bug in Webkit nightly r181886
var arr = Array.from([0].entries());
return arr.length === 1 && isArray(arr[0]) && arr[0][0] === 0 && arr[0][1] === 0;
}());
Iif (!arrayFromSwallowsNegativeLengths || !arrayFromHandlesIterables) {
overrideNative(Array, 'from', ArrayShims.from);
}
var arrayFromHandlesUndefinedMapFunction = (function () {
// Microsoft Edge v0.11 throws if the mapFn argument is *provided* but undefined,
// but the spec doesn't care if it's provided or not - undefined doesn't throw.
return valueOrFalseIfThrows(function () {
return Array.from([0], void 0);
});
}());
Iif (!arrayFromHandlesUndefinedMapFunction) {
var origArrayFrom = Array.from;
overrideNative(Array, 'from', function from(items) {
if (arguments.length > 1 && typeof arguments[1] !== 'undefined') {
return ES.Call(origArrayFrom, this, arguments);
}
return _call(origArrayFrom, this, items);
});
}
var int32sAsOne = -(Math.pow(2, 32) - 1);
var toLengthsCorrectly = function (method, reversed) {
var obj = { length: int32sAsOne };
obj[reversed ? (obj.length >>> 0) - 1 : 0] = true;
return valueOrFalseIfThrows(function () {
_call(method, obj, function () {
// note: in nonconforming browsers, this will be called
// -1 >>> 0 times, which is 4294967295, so the throw matters.
throw new RangeError('should not reach here');
}, []);
return true;
});
};
Iif (!toLengthsCorrectly(Array.prototype.forEach)) {
var originalForEach = Array.prototype.forEach;
overrideNative(Array.prototype, 'forEach', function forEach(callbackFn) {
return ES.Call(originalForEach, this.length >= 0 ? this : [], arguments);
});
}
Iif (!toLengthsCorrectly(Array.prototype.map)) {
var originalMap = Array.prototype.map;
overrideNative(Array.prototype, 'map', function map(callbackFn) {
return ES.Call(originalMap, this.length >= 0 ? this : [], arguments);
});
}
Iif (!toLengthsCorrectly(Array.prototype.filter)) {
var originalFilter = Array.prototype.filter;
overrideNative(Array.prototype, 'filter', function filter(callbackFn) {
return ES.Call(originalFilter, this.length >= 0 ? this : [], arguments);
});
}
Iif (!toLengthsCorrectly(Array.prototype.some)) {
var originalSome = Array.prototype.some;
overrideNative(Array.prototype, 'some', function some(callbackFn) {
return ES.Call(originalSome, this.length >= 0 ? this : [], arguments);
});
}
Iif (!toLengthsCorrectly(Array.prototype.every)) {
var originalEvery = Array.prototype.every;
overrideNative(Array.prototype, 'every', function every(callbackFn) {
return ES.Call(originalEvery, this.length >= 0 ? this : [], arguments);
});
}
Iif (!toLengthsCorrectly(Array.prototype.reduce)) {
var originalReduce = Array.prototype.reduce;
overrideNative(Array.prototype, 'reduce', function reduce(callbackFn) {
return ES.Call(originalReduce, this.length >= 0 ? this : [], arguments);
});
}
Iif (!toLengthsCorrectly(Array.prototype.reduceRight, true)) {
var originalReduceRight = Array.prototype.reduceRight;
overrideNative(Array.prototype, 'reduceRight', function reduceRight(callbackFn) {
return ES.Call(originalReduceRight, this.length >= 0 ? this : [], arguments);
});
}
var lacksOctalSupport = Number('0o10') !== 8;
var lacksBinarySupport = Number('0b10') !== 2;
var trimsNonWhitespace = _some(nonWS, function (c) {
return Number(c + 0 + c) === 0;
});
Iif (lacksOctalSupport || lacksBinarySupport || trimsNonWhitespace) {
var OrigNumber = Number;
var binaryRegex = /^0b[01]+$/i;
var octalRegex = /^0o[0-7]+$/i;
// Note that in IE 8, RegExp.prototype.test doesn't seem to exist: ie, "test" is an own property of regexes. wtf.
var isBinary = binaryRegex.test.bind(binaryRegex);
var isOctal = octalRegex.test.bind(octalRegex);
var toPrimitive = function (O, hint) { // need to replace this with `es-to-primitive/es6`
var result;
if (typeof O.valueOf === 'function') {
result = O.valueOf();
if (Type.primitive(result)) {
return result;
}
}
if (typeof O.toString === 'function') {
result = O.toString();
if (Type.primitive(result)) {
return result;
}
}
throw new TypeError('No default value');
};
var hasNonWS = nonWSregex.test.bind(nonWSregex);
var isBadHex = isBadHexRegex.test.bind(isBadHexRegex);
var NumberShim = (function () {
// this is wrapped in an IIFE because of IE 6-8's wacky scoping issues with named function expressions.
var NumberShim = function Number(value) {
var primValue;
if (arguments.length > 0) {
primValue = Type.primitive(value) ? value : toPrimitive(value, 'number');
} else {
primValue = 0;
}
if (typeof primValue === 'string') {
primValue = ES.Call(trimShim, primValue);
if (isBinary(primValue)) {
primValue = parseInt(_strSlice(primValue, 2), 2);
} else if (isOctal(primValue)) {
primValue = parseInt(_strSlice(primValue, 2), 8);
} else if (hasNonWS(primValue) || isBadHex(primValue)) {
primValue = NaN;
}
}
var receiver = this;
var valueOfSucceeds = valueOrFalseIfThrows(function () {
OrigNumber.prototype.valueOf.call(receiver);
return true;
});
if (receiver instanceof NumberShim && !valueOfSucceeds) {
return new OrigNumber(primValue);
}
return OrigNumber(primValue);
};
return NumberShim;
}());
wrapConstructor(OrigNumber, NumberShim, {});
// this is necessary for ES3 browsers, where these properties are non-enumerable.
defineProperties(NumberShim, {
NaN: OrigNumber.NaN,
MAX_VALUE: OrigNumber.MAX_VALUE,
MIN_VALUE: OrigNumber.MIN_VALUE,
NEGATIVE_INFINITY: OrigNumber.NEGATIVE_INFINITY,
POSITIVE_INFINITY: OrigNumber.POSITIVE_INFINITY
});
Number = NumberShim; // eslint-disable-line no-global-assign
Value.redefine(globals, 'Number', NumberShim);
}
var maxSafeInteger = Math.pow(2, 53) - 1;
defineProperties(Number, {
MAX_SAFE_INTEGER: maxSafeInteger,
MIN_SAFE_INTEGER: -maxSafeInteger,
EPSILON: 2.220446049250313e-16,
parseInt: globals.parseInt,
parseFloat: globals.parseFloat,
isFinite: numberIsFinite,
isInteger: function isInteger(value) {
return numberIsFinite(value) && ES.ToInteger(value) === value;
},
isSafeInteger: function isSafeInteger(value) {
return Number.isInteger(value) && _abs(value) <= Number.MAX_SAFE_INTEGER;
},
isNaN: numberIsNaN
});
// Firefox 37 has a conforming Number.parseInt, but it's not === to the global parseInt (fixed in v40)
defineProperty(Number, 'parseInt', globals.parseInt, Number.parseInt !== globals.parseInt);
// Work around bugs in Array#find and Array#findIndex -- early
// implementations skipped holes in sparse arrays. (Note that the
// implementations of find/findIndex indirectly use shimmed
// methods of Number, so this test has to happen down here.)
/* eslint-disable no-sparse-arrays */
Iif ([, 1].find(function () { return true; }) === 1) {
overrideNative(Array.prototype, 'find', ArrayPrototypeShims.find);
}
Iif ([, 1].findIndex(function () { return true; }) !== 0) {
overrideNative(Array.prototype, 'findIndex', ArrayPrototypeShims.findIndex);
}
/* eslint-enable no-sparse-arrays */
var isEnumerableOn = Function.bind.call(Function.bind, Object.prototype.propertyIsEnumerable);
var ensureEnumerable = function ensureEnumerable(obj, prop) {
Eif (supportsDescriptors && isEnumerableOn(obj, prop)) {
Object.defineProperty(obj, prop, { enumerable: false });
}
};
var sliceArgs = function sliceArgs() {
// per https://github.com/petkaantonov/bluebird/wiki/Optimization-killers#32-leaking-arguments
// and https://gist.github.com/WebReflection/4327762cb87a8c634a29
var initial = Number(this);
var len = arguments.length;
var desiredArgCount = len - initial;
var args = new Array(desiredArgCount < 0 ? 0 : desiredArgCount);
for (var i = initial; i < len; ++i) {
args[i - initial] = arguments[i];
}
return args;
};
var assignTo = function assignTo(source) {
return function assignToSource(target, key) {
target[key] = source[key];
return target;
};
};
var assignReducer = function (target, source) {
var sourceKeys = keys(Object(source));
var symbols;
if (ES.IsCallable(Object.getOwnPropertySymbols)) {
symbols = _filter(Object.getOwnPropertySymbols(Object(source)), isEnumerableOn(source));
}
return _reduce(_concat(sourceKeys, symbols || []), assignTo(source), target);
};
var ObjectShims = {
// 19.1.3.1
assign: function (target, source) {
var to = ES.ToObject(target, 'Cannot convert undefined or null to object');
return _reduce(ES.Call(sliceArgs, 1, arguments), assignReducer, to);
},
// Added in WebKit in https://bugs.webkit.org/show_bug.cgi?id=143865
is: function is(a, b) {
return ES.SameValue(a, b);
}
};
var assignHasPendingExceptions = Object.assign && Object.preventExtensions && (function () {
// Firefox 37 still has "pending exception" logic in its Object.assign implementation,
// which is 72% slower than our shim, and Firefox 40's native implementation.
var thrower = Object.preventExtensions({ 1: 2 });
try {
Object.assign(thrower, 'xy');
} catch (e) {
return thrower[1] === 'y';
}
}());
Iif (assignHasPendingExceptions) {
overrideNative(Object, 'assign', ObjectShims.assign);
}
defineProperties(Object, ObjectShims);
Eif (supportsDescriptors) {
var ES5ObjectShims = {
// 19.1.3.9
// shim from https://gist.github.com/WebReflection/5593554
setPrototypeOf: (function (Object, magic) {
var set;
var checkArgs = function (O, proto) {
if (!ES.TypeIsObject(O)) {
throw new TypeError('cannot set prototype on a non-object');
}
if (!(proto === null || ES.TypeIsObject(proto))) {
throw new TypeError('can only set prototype to an object or null' + proto);
}
};
var setPrototypeOf = function (O, proto) {
checkArgs(O, proto);
_call(set, O, proto);
return O;
};
try {
// this works already in Firefox and Safari
set = Object.getOwnPropertyDescriptor(Object.prototype, magic).set;
_call(set, {}, null);
} catch (e) {
if (Object.prototype !== {}[magic]) {
// IE < 11 cannot be shimmed
return;
}
// probably Chrome or some old Mobile stock browser
set = function (proto) {
this[magic] = proto;
};
// please note that this will **not** work
// in those browsers that do not inherit
// __proto__ by mistake from Object.prototype
// in these cases we should probably throw an error
// or at least be informed about the issue
setPrototypeOf.polyfill = setPrototypeOf(
setPrototypeOf({}, null),
Object.prototype
) instanceof Object;
// setPrototypeOf.polyfill === true means it works as meant
// setPrototypeOf.polyfill === false means it's not 100% reliable
// setPrototypeOf.polyfill === undefined
// or
// setPrototypeOf.polyfill == null means it's not a polyfill
// which means it works as expected
// we can even delete Object.prototype.__proto__;
}
return setPrototypeOf;
}(Object, '__proto__'))
};
defineProperties(Object, ES5ObjectShims);
}
// Workaround bug in Opera 12 where setPrototypeOf(x, null) doesn't work,
// but Object.create(null) does.
Iif (
Object.setPrototypeOf
&& Object.getPrototypeOf
&& Object.getPrototypeOf(Object.setPrototypeOf({}, null)) !== null
&& Object.getPrototypeOf(Object.create(null)) === null
) {
(function () {
var FAKENULL = Object.create(null);
var gpo = Object.getPrototypeOf;
var spo = Object.setPrototypeOf;
Object.getPrototypeOf = function (o) {
var result = gpo(o);
return result === FAKENULL ? null : result;
};
Object.setPrototypeOf = function (o, p) {
var proto = p === null ? FAKENULL : p;
return spo(o, proto);
};
Object.setPrototypeOf.polyfill = false;
}());
}
var objectKeysAcceptsPrimitives = !throwsError(function () { return Object.keys('foo'); });
Iif (!objectKeysAcceptsPrimitives) {
var originalObjectKeys = Object.keys;
overrideNative(Object, 'keys', function keys(value) {
return originalObjectKeys(ES.ToObject(value));
});
keys = Object.keys;
}
var objectKeysRejectsRegex = throwsError(function () { return Object.keys(/a/g); });
Iif (objectKeysRejectsRegex) {
var regexRejectingObjectKeys = Object.keys;
overrideNative(Object, 'keys', function keys(value) {
if (Type.regex(value)) {
var regexKeys = [];
for (var k in value) {
if (_hasOwnProperty(value, k)) {
_push(regexKeys, k);
}
}
return regexKeys;
}
return regexRejectingObjectKeys(value);
});
keys = Object.keys;
}
Eif (Object.getOwnPropertyNames) {
var objectGOPNAcceptsPrimitives = !throwsError(function () { return Object.getOwnPropertyNames('foo'); });
Iif (!objectGOPNAcceptsPrimitives) {
var cachedWindowNames = typeof window === 'object' ? Object.getOwnPropertyNames(window) : [];
var originalObjectGetOwnPropertyNames = Object.getOwnPropertyNames;
overrideNative(Object, 'getOwnPropertyNames', function getOwnPropertyNames(value) {
var val = ES.ToObject(value);
if (_toString(val) === '[object Window]') {
try {
return originalObjectGetOwnPropertyNames(val);
} catch (e) {
// IE bug where layout engine calls userland gOPN for cross-domain `window` objects
return _concat([], cachedWindowNames);
}
}
return originalObjectGetOwnPropertyNames(val);
});
}
}
Eif (Object.getOwnPropertyDescriptor) {
var objectGOPDAcceptsPrimitives = !throwsError(function () { return Object.getOwnPropertyDescriptor('foo', 'bar'); });
Iif (!objectGOPDAcceptsPrimitives) {
var originalObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
overrideNative(Object, 'getOwnPropertyDescriptor', function getOwnPropertyDescriptor(value, property) {
return originalObjectGetOwnPropertyDescriptor(ES.ToObject(value), property);
});
}
}
Eif (Object.seal) {
var objectSealAcceptsPrimitives = !throwsError(function () { return Object.seal('foo'); });
Iif (!objectSealAcceptsPrimitives) {
var originalObjectSeal = Object.seal;
overrideNative(Object, 'seal', function seal(value) {
if (!ES.TypeIsObject(value)) { return value; }
return originalObjectSeal(value);
});
}
}
Eif (Object.isSealed) {
var objectIsSealedAcceptsPrimitives = !throwsError(function () { return Object.isSealed('foo'); });
Iif (!objectIsSealedAcceptsPrimitives) {
var originalObjectIsSealed = Object.isSealed;
overrideNative(Object, 'isSealed', function isSealed(value) {
if (!ES.TypeIsObject(value)) { return true; }
return originalObjectIsSealed(value);
});
}
}
Eif (Object.freeze) {
var objectFreezeAcceptsPrimitives = !throwsError(function () { return Object.freeze('foo'); });
Iif (!objectFreezeAcceptsPrimitives) {
var originalObjectFreeze = Object.freeze;
overrideNative(Object, 'freeze', function freeze(value) {
if (!ES.TypeIsObject(value)) { return value; }
return originalObjectFreeze(value);
});
}
}
Eif (Object.isFrozen) {
var objectIsFrozenAcceptsPrimitives = !throwsError(function () { return Object.isFrozen('foo'); });
Iif (!objectIsFrozenAcceptsPrimitives) {
var originalObjectIsFrozen = Object.isFrozen;
overrideNative(Object, 'isFrozen', function isFrozen(value) {
if (!ES.TypeIsObject(value)) { return true; }
return originalObjectIsFrozen(value);
});
}
}
Eif (Object.preventExtensions) {
var objectPreventExtensionsAcceptsPrimitives = !throwsError(function () { return Object.preventExtensions('foo'); });
Iif (!objectPreventExtensionsAcceptsPrimitives) {
var originalObjectPreventExtensions = Object.preventExtensions;
overrideNative(Object, 'preventExtensions', function preventExtensions(value) {
if (!ES.TypeIsObject(value)) { return value; }
return originalObjectPreventExtensions(value);
});
}
}
Eif (Object.isExtensible) {
var objectIsExtensibleAcceptsPrimitives = !throwsError(function () { return Object.isExtensible('foo'); });
Iif (!objectIsExtensibleAcceptsPrimitives) {
var originalObjectIsExtensible = Object.isExtensible;
overrideNative(Object, 'isExtensible', function isExtensible(value) {
if (!ES.TypeIsObject(value)) { return false; }
return originalObjectIsExtensible(value);
});
}
}
Eif (Object.getPrototypeOf) {
var objectGetProtoAcceptsPrimitives = !throwsError(function () { return Object.getPrototypeOf('foo'); });
Iif (!objectGetProtoAcceptsPrimitives) {
var originalGetProto = Object.getPrototypeOf;
overrideNative(Object, 'getPrototypeOf', function getPrototypeOf(value) {
return originalGetProto(ES.ToObject(value));
});
}
}
var hasFlags = supportsDescriptors && (function () {
var desc = Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags');
return desc && ES.IsCallable(desc.get);
}());
Iif (supportsDescriptors && !hasFlags) {
var regExpFlagsGetter = function flags() {
if (!ES.TypeIsObject(this)) {
throw new TypeError('Method called on incompatible type: must be an object.');
}
var result = '';
if (this.global) {
result += 'g';
}
if (this.ignoreCase) {
result += 'i';
}
if (this.multiline) {
result += 'm';
}
if (this.unicode) {
result += 'u';
}
if (this.sticky) {
result += 'y';
}
return result;
};
Value.getter(RegExp.prototype, 'flags', regExpFlagsGetter);
}
var regExpSupportsFlagsWithRegex = supportsDescriptors && valueOrFalseIfThrows(function () {
return String(new RegExp(/a/g, 'i')) === '/a/i';
});
var regExpNeedsToSupportSymbolMatch = hasSymbols && supportsDescriptors && (function () {
// Edge 0.12 supports flags fully, but does not support Symbol.match
var regex = /./;
regex[Symbol.match] = false;
return RegExp(regex) === regex;
}());
var regexToStringIsGeneric = valueOrFalseIfThrows(function () {
return RegExp.prototype.toString.call({ source: 'abc' }) === '/abc/';
});
var regexToStringSupportsGenericFlags = regexToStringIsGeneric && valueOrFalseIfThrows(function () {
return RegExp.prototype.toString.call({ source: 'a', flags: 'b' }) === '/a/b';
});
Eif (!regexToStringIsGeneric || !regexToStringSupportsGenericFlags) {
var origRegExpToString = RegExp.prototype.toString;
defineProperty(RegExp.prototype, 'toString', function toString() {
var R = ES.RequireObjectCoercible(this);
if (Type.regex(R)) {
return _call(origRegExpToString, R);
}
var pattern = $String(R.source);
var flags = $String(R.flags);
return '/' + pattern + '/' + flags;
}, true);
Value.preserveToString(RegExp.prototype.toString, origRegExpToString);
RegExp.prototype.toString.prototype = void 0;
}
Iif (supportsDescriptors && (!regExpSupportsFlagsWithRegex || regExpNeedsToSupportSymbolMatch)) {
var flagsGetter = Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags').get;
var sourceDesc = Object.getOwnPropertyDescriptor(RegExp.prototype, 'source') || {};
var legacySourceGetter = function () {
// prior to it being a getter, it's own + nonconfigurable
return this.source;
};
var sourceGetter = ES.IsCallable(sourceDesc.get) ? sourceDesc.get : legacySourceGetter;
var OrigRegExp = RegExp;
var RegExpShim = (function () {
return function RegExp(pattern, flags) {
var patternIsRegExp = ES.IsRegExp(pattern);
var calledWithNew = this instanceof RegExp;
if (!calledWithNew && patternIsRegExp && typeof flags === 'undefined' && pattern.constructor === RegExp) {
return pattern;
}
var P = pattern;
var F = flags;
if (Type.regex(pattern)) {
P = ES.Call(sourceGetter, pattern);
F = typeof flags === 'undefined' ? ES.Call(flagsGetter, pattern) : flags;
return new RegExp(P, F);
} else if (patternIsRegExp) {
P = pattern.source;
F = typeof flags === 'undefined' ? pattern.flags : flags;
}
return new OrigRegExp(pattern, flags);
};
}());
wrapConstructor(OrigRegExp, RegExpShim, {
$input: true // Chrome < v39 & Opera < 26 have a nonstandard "$input" property
});
RegExp = RegExpShim; // eslint-disable-line no-global-assign
Value.redefine(globals, 'RegExp', RegExpShim);
}
Eif (supportsDescriptors) {
var regexGlobals = {
input: '$_',
lastMatch: '$&',
lastParen: '$+',
leftContext: '$`',
rightContext: '$\''
};
_forEach(keys(regexGlobals), function (prop) {
Iif (prop in RegExp && !(regexGlobals[prop] in RegExp)) {
Value.getter(RegExp, regexGlobals[prop], function get() {
return RegExp[prop];
});
}
});
}
addDefaultSpecies(RegExp);
var inverseEpsilon = 1 / Number.EPSILON;
var roundTiesToEven = function roundTiesToEven(n) {
// Even though this reduces down to `return n`, it takes advantage of built-in rounding.
return (n + inverseEpsilon) - inverseEpsilon;
};
var BINARY_32_EPSILON = Math.pow(2, -23);
var BINARY_32_MAX_VALUE = Math.pow(2, 127) * (2 - BINARY_32_EPSILON);
var BINARY_32_MIN_VALUE = Math.pow(2, -126);
var E = Math.E;
var LOG2E = Math.LOG2E;
var LOG10E = Math.LOG10E;
var numberCLZ = Number.prototype.clz;
delete Number.prototype.clz; // Safari 8 has Number#clz
var MathShims = {
acosh: function acosh(value) {
var x = Number(value);
if (numberIsNaN(x) || value < 1) { return NaN; }
if (x === 1) { return 0; }
if (x === Infinity) { return x; }
var xInvSquared = 1 / (x * x);
if (x < 2) {
return _log1p(x - 1 + (_sqrt(1 - xInvSquared) * x));
}
var halfX = x / 2;
return _log1p(halfX + (_sqrt(1 - xInvSquared) * halfX) - 1) + (1 / LOG2E);
},
asinh: function asinh(value) {
var x = Number(value);
if (x === 0 || !globalIsFinite(x)) {
return x;
}
var a = _abs(x);
var aSquared = a * a;
var s = _sign(x);
if (a < 1) {
return s * _log1p(a + (aSquared / (_sqrt(aSquared + 1) + 1)));
}
return s * (_log1p((a / 2) + (_sqrt(1 + (1 / aSquared)) * a / 2) - 1) + (1 / LOG2E));
},
atanh: function atanh(value) {
var x = Number(value);
if (x === 0) { return x; }
if (x === -1) { return -Infinity; }
if (x === 1) { return Infinity; }
if (numberIsNaN(x) || x < -1 || x > 1) {
return NaN;
}
var a = _abs(x);
return _sign(x) * _log1p(2 * a / (1 - a)) / 2;
},
cbrt: function cbrt(value) {
var x = Number(value);
if (x === 0) { return x; }
var negate = x < 0;
var result;
if (negate) { x = -x; }
if (x === Infinity) {
result = Infinity;
} else {
result = _exp(_log(x) / 3);
// from http://en.wikipedia.org/wiki/Cube_root#Numerical_methods
result = ((x / (result * result)) + (2 * result)) / 3;
}
return negate ? -result : result;
},
clz32: function clz32(value) {
// See https://bugs.ecmascript.org/show_bug.cgi?id=2465
var x = Number(value);
var number = ES.ToUint32(x);
if (number === 0) {
return 32;
}
return numberCLZ ? ES.Call(numberCLZ, number) : 31 - _floor(_log(number + 0.5) * LOG2E);
},
cosh: function cosh(value) {
var x = Number(value);
if (x === 0) { return 1; } // +0 or -0
if (numberIsNaN(x)) { return NaN; }
if (!globalIsFinite(x)) { return Infinity; }
var t = _exp(_abs(x) - 1);
return (t + (1 / (t * E * E))) * (E / 2);
},
expm1: function expm1(value) {
var x = Number(value);
if (x === -Infinity) { return -1; }
if (!globalIsFinite(x) || x === 0) { return x; }
if (_abs(x) > 0.5) {
return _exp(x) - 1;
}
// A more precise approximation using Taylor series expansion
// from https://github.com/paulmillr/es6-shim/issues/314#issuecomment-70293986
var t = x;
var sum = 0;
var n = 1;
while (sum + t !== sum) {
sum += t;
n += 1;
t *= x / n;
}
return sum;
},
hypot: function hypot(x, y) {
var result = 0;
var largest = 0;
for (var i = 0; i < arguments.length; ++i) {
var value = _abs(Number(arguments[i]));
if (largest < value) {
result *= (largest / value) * (largest / value);
result += 1;
largest = value;
} else {
result += value > 0 ? (value / largest) * (value / largest) : value;
}
}
return largest === Infinity ? Infinity : largest * _sqrt(result);
},
log2: function log2(value) {
return _log(value) * LOG2E;
},
log10: function log10(value) {
return _log(value) * LOG10E;
},
log1p: _log1p,
sign: _sign,
sinh: function sinh(value) {
var x = Number(value);
if (!globalIsFinite(x) || x === 0) { return x; }
var a = _abs(x);
if (a < 1) {
var u = Math.expm1(a);
return _sign(x) * u * (1 + (1 / (u + 1))) / 2;
}
var t = _exp(a - 1);
return _sign(x) * (t - (1 / (t * E * E))) * (E / 2);
},
tanh: function tanh(value) {
var x = Number(value);
if (numberIsNaN(x) || x === 0) { return x; }
// can exit early at +-20 as JS loses precision for true value at this integer
if (x >= 20) { return 1; }
if (x <= -20) { return -1; }
return (Math.expm1(x) - Math.expm1(-x)) / (_exp(x) + _exp(-x));
},
trunc: function trunc(value) {
var x = Number(value);
return x < 0 ? -_floor(-x) : _floor(x);
},
imul: function imul(x, y) {
// taken from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul
var a = ES.ToUint32(x);
var b = ES.ToUint32(y);
var ah = (a >>> 16) & 0xffff;
var al = a & 0xffff;
var bh = (b >>> 16) & 0xffff;
var bl = b & 0xffff;
// the shift by 0 fixes the sign on the high part
// the final |0 converts the unsigned value into a signed value
return (al * bl) + ((((ah * bl) + (al * bh)) << 16) >>> 0) | 0;
},
fround: function fround(x) {
var v = Number(x);
if (v === 0 || v === Infinity || v === -Infinity || numberIsNaN(v)) {
return v;
}
var sign = _sign(v);
var abs = _abs(v);
if (abs < BINARY_32_MIN_VALUE) {
return sign * roundTiesToEven(abs / BINARY_32_MIN_VALUE / BINARY_32_EPSILON) * BINARY_32_MIN_VALUE * BINARY_32_EPSILON;
}
// Veltkamp's splitting (?)
var a = (1 + (BINARY_32_EPSILON / Number.EPSILON)) * abs;
var result = a - (a - abs);
if (result > BINARY_32_MAX_VALUE || numberIsNaN(result)) {
return sign * Infinity;
}
return sign * result;
}
};
var withinULPDistance = function withinULPDistance(result, expected, distance) {
return _abs(1 - (result / expected)) / Number.EPSILON < (distance || 8);
};
defineProperties(Math, MathShims);
// Chrome < 40 sinh returns ∞ for large numbers
defineProperty(Math, 'sinh', MathShims.sinh, Math.sinh(710) === Infinity);
// Chrome < 40 cosh returns ∞ for large numbers
defineProperty(Math, 'cosh', MathShims.cosh, Math.cosh(710) === Infinity);
// IE 11 TP has an imprecise log1p: reports Math.log1p(-1e-17) as 0
defineProperty(Math, 'log1p', MathShims.log1p, Math.log1p(-1e-17) !== -1e-17);
// IE 11 TP has an imprecise asinh: reports Math.asinh(-1e7) as not exactly equal to -Math.asinh(1e7)
defineProperty(Math, 'asinh', MathShims.asinh, Math.asinh(-1e7) !== -Math.asinh(1e7));
// Chrome < 54 asinh returns ∞ for large numbers and should not
defineProperty(Math, 'asinh', MathShims.asinh, Math.asinh(1e+300) === Infinity);
// Chrome < 54 atanh incorrectly returns 0 for large numbers
defineProperty(Math, 'atanh', MathShims.atanh, Math.atanh(1e-300) === 0);
// Chrome 40 has an imprecise Math.tanh with very small numbers
defineProperty(Math, 'tanh', MathShims.tanh, Math.tanh(-2e-17) !== -2e-17);
// Chrome 40 loses Math.acosh precision with high numbers
defineProperty(Math, 'acosh', MathShims.acosh, Math.acosh(Number.MAX_VALUE) === Infinity);
// Chrome < 54 has an inaccurate acosh for EPSILON deltas
defineProperty(Math, 'acosh', MathShims.acosh, !withinULPDistance(Math.acosh(1 + Number.EPSILON), Math.sqrt(2 * Number.EPSILON)));
// Firefox 38 on Windows
defineProperty(Math, 'cbrt', MathShims.cbrt, !withinULPDistance(Math.cbrt(1e-300), 1e-100));
// node 0.11 has an imprecise Math.sinh with very small numbers
defineProperty(Math, 'sinh', MathShims.sinh, Math.sinh(-2e-17) !== -2e-17);
// FF 35 on Linux reports 22025.465794806725 for Math.expm1(10)
var expm1OfTen = Math.expm1(10);
defineProperty(Math, 'expm1', MathShims.expm1, expm1OfTen > 22025.465794806719 || expm1OfTen < 22025.4657948067165168);
// node v12.11 - v12.15 report NaN
defineProperty(Math, 'hypot', MathShims.hypot, Math.hypot(Infinity, NaN) !== Infinity);
var origMathRound = Math.round;
// breaks in e.g. Safari 8, Internet Explorer 11, Opera 12
var roundHandlesBoundaryConditions = Math.round(0.5 - (Number.EPSILON / 4)) === 0
&& Math.round(-0.5 + (Number.EPSILON / 3.99)) === 1;
// When engines use Math.floor(x + 0.5) internally, Math.round can be buggy for large integers.
// This behavior should be governed by "round to nearest, ties to even mode"
// see http://www.ecma-international.org/ecma-262/6.0/#sec-terms-and-definitions-number-type
// These are the boundary cases where it breaks.
var smallestPositiveNumberWhereRoundBreaks = inverseEpsilon + 1;
var largestPositiveNumberWhereRoundBreaks = (2 * inverseEpsilon) - 1;
var roundDoesNotIncreaseIntegers = [
smallestPositiveNumberWhereRoundBreaks,
largestPositiveNumberWhereRoundBreaks
].every(function (num) {
return Math.round(num) === num;
});
defineProperty(Math, 'round', function round(x) {
var floor = _floor(x);
var ceil = floor === -1 ? -0 : floor + 1;
return x - floor < 0.5 ? floor : ceil;
}, !roundHandlesBoundaryConditions || !roundDoesNotIncreaseIntegers);
Value.preserveToString(Math.round, origMathRound);
var origImul = Math.imul;
Iif (Math.imul(0xffffffff, 5) !== -5) {
// Safari 6.1, at least, reports "0" for this value
Math.imul = MathShims.imul;
Value.preserveToString(Math.imul, origImul);
}
Iif (Math.imul.length !== 2) {
// Safari 8.0.4 has a length of 1
// fixed in https://bugs.webkit.org/show_bug.cgi?id=143658
overrideNative(Math, 'imul', function imul(x, y) {
return ES.Call(origImul, Math, arguments);
});
}
// Promises
// Simplest possible implementation; use a 3rd-party library if you
// want the best possible speed and/or long stack traces.
var PromiseShim = (function () {
var setTimeout = globals.setTimeout;
// some environments don't have setTimeout - no way to shim here.
Iif (typeof setTimeout !== 'function' && typeof setTimeout !== 'object') { return; }
ES.IsPromise = function (promise) {
if (!ES.TypeIsObject(promise)) {
return false;
}
if (typeof promise._promise === 'undefined') {
return false; // uninitialized, or missing our hidden field.
}
return true;
};
// "PromiseCapability" in the spec is what most promise implementations
// call a "deferred".
var PromiseCapability = function (C) {
Iif (!ES.IsConstructor(C)) {
throw new TypeError('Bad promise constructor');
}
var capability = this;
var resolver = function (resolve, reject) {
Iif (capability.resolve !== void 0 || capability.reject !== void 0) {
throw new TypeError('Bad Promise implementation!');
}
capability.resolve = resolve;
capability.reject = reject;
};
// Initialize fields to inform optimizers about the object shape.
capability.resolve = void 0;
capability.reject = void 0;
capability.promise = new C(resolver);
Iif (!(ES.IsCallable(capability.resolve) && ES.IsCallable(capability.reject))) {
throw new TypeError('Bad promise constructor');
}
};
// find an appropriate setImmediate-alike
var makeZeroTimeout;
Iif (typeof window !== 'undefined' && ES.IsCallable(window.postMessage)) {
makeZeroTimeout = function () {
// from http://dbaron.org/log/20100309-faster-timeouts
var timeouts = [];
var messageName = 'zero-timeout-message';
var setZeroTimeout = function (fn) {
_push(timeouts, fn);
window.postMessage(messageName, '*');
};
var handleMessage = function (event) {
if (event.source === window && event.data === messageName) {
event.stopPropagation();
if (timeouts.length === 0) { return; }
var fn = _shift(timeouts);
fn();
}
};
window.addEventListener('message', handleMessage, true);
return setZeroTimeout;
};
}
var makePromiseAsap = function () {
// An efficient task-scheduler based on a pre-existing Promise
// implementation, which we can use even if we override the
// global Promise below (in order to workaround bugs)
// https://github.com/Raynos/observ-hash/issues/2#issuecomment-35857671
var P = globals.Promise;
var pr = P && P.resolve && P.resolve();
return pr && function (task) {
return pr.then(task);
};
};
var enqueue = ES.IsCallable(globals.setImmediate)
? globals.setImmediate
: (
typeof process === 'object' && process.nextTick
? process.nextTick
: makePromiseAsap() || (ES.IsCallable(makeZeroTimeout) ? makeZeroTimeout() : function (task) { setTimeout(task, 0); })
); // fallback
// Constants for Promise implementation
var PROMISE_IDENTITY = function (x) { return x; };
var PROMISE_THROWER = function (e) { throw e; };
var PROMISE_PENDING = 0;
var PROMISE_FULFILLED = 1;
var PROMISE_REJECTED = 2;
// We store fulfill/reject handlers and capabilities in a single array.
var PROMISE_FULFILL_OFFSET = 0;
var PROMISE_REJECT_OFFSET = 1;
var PROMISE_CAPABILITY_OFFSET = 2;
// This is used in an optimization for chaining promises via then.
var PROMISE_FAKE_CAPABILITY = {};
var enqueuePromiseReactionJob = function (handler, capability, argument) {
enqueue(function () {
promiseReactionJob(handler, capability, argument);
});
};
var promiseReactionJob = function (handler, promiseCapability, argument) {
var handlerResult, f;
if (promiseCapability === PROMISE_FAKE_CAPABILITY) {
// Fast case, when we don't actually need to chain through to a
// (real) promiseCapability.
return handler(argument);
}
try {
handlerResult = handler(argument);
f = promiseCapability.resolve;
} catch (e) {
handlerResult = e;
f = promiseCapability.reject;
}
f(handlerResult);
};
var fulfillPromise = function (promise, value) {
var _promise = promise._promise;
var length = _promise.reactionLength;
if (length > 0) {
enqueuePromiseReactionJob(
_promise.fulfillReactionHandler0,
_promise.reactionCapability0,
value
);
_promise.fulfillReactionHandler0 = void 0;
_promise.rejectReactions0 = void 0;
_promise.reactionCapability0 = void 0;
if (length > 1) {
for (var i = 1, idx = 0; i < length; i++, idx += 3) {
enqueuePromiseReactionJob(
_promise[idx + PROMISE_FULFILL_OFFSET],
_promise[idx + PROMISE_CAPABILITY_OFFSET],
value
);
promise[idx + PROMISE_FULFILL_OFFSET] = void 0;
promise[idx + PROMISE_REJECT_OFFSET] = void 0;
promise[idx + PROMISE_CAPABILITY_OFFSET] = void 0;
}
}
}
_promise.result = value;
_promise.state = PROMISE_FULFILLED;
_promise.reactionLength = 0;
};
var rejectPromise = function (promise, reason) {
var _promise = promise._promise;
var length = _promise.reactionLength;
if (length > 0) {
enqueuePromiseReactionJob(
_promise.rejectReactionHandler0,
_promise.reactionCapability0,
reason
);
_promise.fulfillReactionHandler0 = void 0;
_promise.rejectReactions0 = void 0;
_promise.reactionCapability0 = void 0;
if (length > 1) {
for (var i = 1, idx = 0; i < length; i++, idx += 3) {
enqueuePromiseReactionJob(
_promise[idx + PROMISE_REJECT_OFFSET],
_promise[idx + PROMISE_CAPABILITY_OFFSET],
reason
);
promise[idx + PROMISE_FULFILL_OFFSET] = void 0;
promise[idx + PROMISE_REJECT_OFFSET] = void 0;
promise[idx + PROMISE_CAPABILITY_OFFSET] = void 0;
}
}
}
_promise.result = reason;
_promise.state = PROMISE_REJECTED;
_promise.reactionLength = 0;
};
var createResolvingFunctions = function (promise) {
var alreadyResolved = false;
var resolve = function (resolution) {
var then;
if (alreadyResolved) { return; }
alreadyResolved = true;
if (resolution === promise) {
return rejectPromise(promise, new TypeError('Self resolution'));
}
if (!ES.TypeIsObject(resolution)) {
return fulfillPromise(promise, resolution);
}
try {
then = resolution.then;
} catch (e) {
return rejectPromise(promise, e);
}
if (!ES.IsCallable(then)) {
return fulfillPromise(promise, resolution);
}
enqueue(function () {
promiseResolveThenableJob(promise, resolution, then);
});
};
var reject = function (reason) {
if (alreadyResolved) { return; }
alreadyResolved = true;
return rejectPromise(promise, reason);
};
return { resolve: resolve, reject: reject };
};
var optimizedThen = function (then, thenable, resolve, reject) {
// Optimization: since we discard the result, we can pass our
// own then implementation a special hint to let it know it
// doesn't have to create it. (The PROMISE_FAKE_CAPABILITY
// object is local to this implementation and unforgeable outside.)
if (then === Promise$prototype$then) {
_call(then, thenable, resolve, reject, PROMISE_FAKE_CAPABILITY);
} else {
_call(then, thenable, resolve, reject);
}
};
var promiseResolveThenableJob = function (promise, thenable, then) {
var resolvingFunctions = createResolvingFunctions(promise);
var resolve = resolvingFunctions.resolve;
var reject = resolvingFunctions.reject;
try {
optimizedThen(then, thenable, resolve, reject);
} catch (e) {
reject(e);
}
};
var Promise$prototype, Promise$prototype$then;
var Promise = (function () {
var PromiseShim = function Promise(resolver) {
Iif (!(this instanceof PromiseShim)) {
throw new TypeError('Constructor Promise requires "new"');
}
Iif (this && this._promise) {
throw new TypeError('Bad construction');
}
// see https://bugs.ecmascript.org/show_bug.cgi?id=2482
Iif (!ES.IsCallable(resolver)) {
throw new TypeError('not a valid resolver');
}
var promise = emulateES6construct(this, PromiseShim, Promise$prototype, {
_promise: {
result: void 0,
state: PROMISE_PENDING,
// The first member of the "reactions" array is inlined here,
// since most promises only have one reaction.
// We've also exploded the 'reaction' object to inline the
// "handler" and "capability" fields, since both fulfill and
// reject reactions share the same capability.
reactionLength: 0,
fulfillReactionHandler0: void 0,
rejectReactionHandler0: void 0,
reactionCapability0: void 0
}
});
var resolvingFunctions = createResolvingFunctions(promise);
var reject = resolvingFunctions.reject;
try {
resolver(resolvingFunctions.resolve, reject);
} catch (e) {
reject(e);
}
return promise;
};
return PromiseShim;
}());
Promise$prototype = Promise.prototype;
var _promiseAllResolver = function (index, values, capability, remaining) {
var alreadyCalled = false;
return function (x) {
if (alreadyCalled) { return; }
alreadyCalled = true;
values[index] = x;
if ((--remaining.count) === 0) {
var resolve = capability.resolve;
resolve(values); // call w/ this===undefined
}
};
};
var performPromiseAll = function (iteratorRecord, C, resultCapability) {
var it = iteratorRecord.iterator;
var values = [];
var remaining = { count: 1 };
var next, nextValue;
var index = 0;
while (true) {
try {
next = ES.IteratorStep(it);
if (next === false) {
iteratorRecord.done = true;
break;
}
nextValue = next.value;
} catch (e) {
iteratorRecord.done = true;
throw e;
}
values[index] = void 0;
var nextPromise = C.resolve(nextValue);
var resolveElement = _promiseAllResolver(
index,
values,
resultCapability,
remaining
);
remaining.count += 1;
optimizedThen(nextPromise.then, nextPromise, resolveElement, resultCapability.reject);
index += 1;
}
if ((--remaining.count) === 0) {
var resolve = resultCapability.resolve;
resolve(values); // call w/ this===undefined
}
return resultCapability.promise;
};
var performPromiseRace = function (iteratorRecord, C, resultCapability) {
var it = iteratorRecord.iterator;
var next, nextValue, nextPromise;
while (true) {
try {
next = ES.IteratorStep(it);
if (next === false) {
// NOTE: If iterable has no items, resulting promise will never
// resolve; see:
// https://github.com/domenic/promises-unwrapping/issues/75
// https://bugs.ecmascript.org/show_bug.cgi?id=2515
iteratorRecord.done = true;
break;
}
nextValue = next.value;
} catch (e) {
iteratorRecord.done = true;
throw e;
}
nextPromise = C.resolve(nextValue);
optimizedThen(nextPromise.then, nextPromise, resultCapability.resolve, resultCapability.reject);
}
return resultCapability.promise;
};
defineProperties(Promise, {
all: function all(iterable) {
var C = this;
if (!ES.TypeIsObject(C)) {
throw new TypeError('Promise is not object');
}
var capability = new PromiseCapability(C);
var iterator, iteratorRecord;
try {
iterator = ES.GetIterator(iterable);
iteratorRecord = { iterator: iterator, done: false };
return performPromiseAll(iteratorRecord, C, capability);
} catch (e) {
var exception = e;
if (iteratorRecord && !iteratorRecord.done) {
try {
ES.IteratorClose(iterator, true);
} catch (ee) {
exception = ee;
}
}
var reject = capability.reject;
reject(exception);
return capability.promise;
}
},
race: function race(iterable) {
var C = this;
if (!ES.TypeIsObject(C)) {
throw new TypeError('Promise is not object');
}
var capability = new PromiseCapability(C);
var iterator, iteratorRecord;
try {
iterator = ES.GetIterator(iterable);
iteratorRecord = { iterator: iterator, done: false };
return performPromiseRace(iteratorRecord, C, capability);
} catch (e) {
var exception = e;
if (iteratorRecord && !iteratorRecord.done) {
try {
ES.IteratorClose(iterator, true);
} catch (ee) {
exception = ee;
}
}
var reject = capability.reject;
reject(exception);
return capability.promise;
}
},
reject: function reject(reason) {
var C = this;
if (!ES.TypeIsObject(C)) {
throw new TypeError('Bad promise constructor');
}
var capability = new PromiseCapability(C);
var rejectFunc = capability.reject;
rejectFunc(reason); // call with this===undefined
return capability.promise;
},
resolve: function resolve(v) {
// See https://esdiscuss.org/topic/fixing-promise-resolve for spec
var C = this;
if (!ES.TypeIsObject(C)) {
throw new TypeError('Bad promise constructor');
}
if (ES.IsPromise(v)) {
var constructor = v.constructor;
if (constructor === C) {
return v;
}
}
var capability = new PromiseCapability(C);
var resolveFunc = capability.resolve;
resolveFunc(v); // call with this===undefined
return capability.promise;
}
});
defineProperties(Promise$prototype, {
'catch': function (onRejected) {
return this.then(null, onRejected);
},
then: function then(onFulfilled, onRejected) {
var promise = this;
if (!ES.IsPromise(promise)) { throw new TypeError('not a promise'); }
var C = ES.SpeciesConstructor(promise, Promise);
var resultCapability;
var returnValueIsIgnored = arguments.length > 2 && arguments[2] === PROMISE_FAKE_CAPABILITY;
if (returnValueIsIgnored && C === Promise) {
resultCapability = PROMISE_FAKE_CAPABILITY;
} else {
resultCapability = new PromiseCapability(C);
}
// PerformPromiseThen(promise, onFulfilled, onRejected, resultCapability)
// Note that we've split the 'reaction' object into its two
// components, "capabilities" and "handler"
// "capabilities" is always equal to `resultCapability`
var fulfillReactionHandler = ES.IsCallable(onFulfilled) ? onFulfilled : PROMISE_IDENTITY;
var rejectReactionHandler = ES.IsCallable(onRejected) ? onRejected : PROMISE_THROWER;
var _promise = promise._promise;
var value;
if (_promise.state === PROMISE_PENDING) {
if (_promise.reactionLength === 0) {
_promise.fulfillReactionHandler0 = fulfillReactionHandler;
_promise.rejectReactionHandler0 = rejectReactionHandler;
_promise.reactionCapability0 = resultCapability;
} else {
var idx = 3 * (_promise.reactionLength - 1);
_promise[idx + PROMISE_FULFILL_OFFSET] = fulfillReactionHandler;
_promise[idx + PROMISE_REJECT_OFFSET] = rejectReactionHandler;
_promise[idx + PROMISE_CAPABILITY_OFFSET] = resultCapability;
}
_promise.reactionLength += 1;
} else if (_promise.state === PROMISE_FULFILLED) {
value = _promise.result;
enqueuePromiseReactionJob(
fulfillReactionHandler,
resultCapability,
value
);
} else if (_promise.state === PROMISE_REJECTED) {
value = _promise.result;
enqueuePromiseReactionJob(
rejectReactionHandler,
resultCapability,
value
);
} else {
throw new TypeError('unexpected Promise state');
}
return resultCapability.promise;
}
});
// This helps the optimizer by ensuring that methods which take
// capabilities aren't polymorphic.
PROMISE_FAKE_CAPABILITY = new PromiseCapability(Promise);
Promise$prototype$then = Promise$prototype.then;
return Promise;
}());
// Chrome's native Promise has extra methods that it shouldn't have. Let's remove them.
Eif (globals.Promise) {
delete globals.Promise.accept;
delete globals.Promise.defer;
delete globals.Promise.prototype.chain;
}
Eif (typeof PromiseShim === 'function') {
// export the Promise constructor.
defineProperties(globals, { Promise: PromiseShim });
// In Chrome 33 (and thereabouts) Promise is defined, but the
// implementation is buggy in a number of ways. Let's check subclassing
// support to see if we have a buggy implementation.
var promiseSupportsSubclassing = supportsSubclassing(globals.Promise, function (S) {
return S.resolve(42).then(function () {}) instanceof S;
});
var promiseIgnoresNonFunctionThenCallbacks = !throwsError(function () {
return globals.Promise.reject(42).then(null, 5).then(null, noop);
});
var promiseRequiresObjectContext = throwsError(function () { return globals.Promise.call(3, noop); });
// Promise.resolve() was errata'ed late in the ES6 process.
// See: https://bugzilla.mozilla.org/show_bug.cgi?id=1170742
// https://code.google.com/p/v8/issues/detail?id=4161
// It serves as a proxy for a number of other bugs in early Promise
// implementations.
var promiseResolveBroken = (function (Promise) {
var p = Promise.resolve(5);
p.constructor = {};
var p2 = Promise.resolve(p);
try {
p2.then(null, noop).then(null, noop); // avoid "uncaught rejection" warnings in console
} catch (e) {
return true; // v8 native Promises break here https://code.google.com/p/chromium/issues/detail?id=575314
}
return p === p2; // This *should* be false!
}(globals.Promise));
// Chrome 46 (probably older too) does not retrieve a thenable's .then synchronously
var getsThenSynchronously = supportsDescriptors && (function () {
var count = 0;
// eslint-disable-next-line getter-return
var thenable = Object.defineProperty({}, 'then', { get: function () { count += 1; } });
Promise.resolve(thenable);
return count === 1;
}());
var BadResolverPromise = function BadResolverPromise(executor) {
var p = new Promise(executor);
executor(3, function () {});
this.then = p.then;
this.constructor = BadResolverPromise;
};
BadResolverPromise.prototype = Promise.prototype;
BadResolverPromise.all = Promise.all;
// Chrome Canary 49 (probably older too) has some implementation bugs
var hasBadResolverPromise = valueOrFalseIfThrows(function () {
return !!BadResolverPromise.all([1, 2]);
});
Iif (
!promiseSupportsSubclassing
|| !promiseIgnoresNonFunctionThenCallbacks
|| !promiseRequiresObjectContext
|| promiseResolveBroken
|| !getsThenSynchronously
|| hasBadResolverPromise
) {
Promise = PromiseShim; // eslint-disable-line no-global-assign
overrideNative(globals, 'Promise', PromiseShim);
}
Iif (Promise.all.length !== 1) {
var origAll = Promise.all;
overrideNative(Promise, 'all', function all(iterable) {
return ES.Call(origAll, this, arguments);
});
}
Iif (Promise.race.length !== 1) {
var origRace = Promise.race;
overrideNative(Promise, 'race', function race(iterable) {
return ES.Call(origRace, this, arguments);
});
}
Iif (Promise.resolve.length !== 1) {
var origResolve = Promise.resolve;
overrideNative(Promise, 'resolve', function resolve(x) {
return ES.Call(origResolve, this, arguments);
});
}
Iif (Promise.reject.length !== 1) {
var origReject = Promise.reject;
overrideNative(Promise, 'reject', function reject(r) {
return ES.Call(origReject, this, arguments);
});
}
ensureEnumerable(Promise, 'all');
ensureEnumerable(Promise, 'race');
ensureEnumerable(Promise, 'resolve');
ensureEnumerable(Promise, 'reject');
addDefaultSpecies(Promise);
}
// Map and Set require a true ES5 environment
// Their fast path also requires that the environment preserve
// property insertion order, which is not guaranteed by the spec.
var testOrder = function (a) {
var b = keys(_reduce(a, function (o, k) {
o[k] = true;
return o;
}, {}));
return a.join(':') === b.join(':');
};
var preservesInsertionOrder = testOrder(['z', 'a', 'bb']);
// some engines (eg, Chrome) only preserve insertion order for string keys
var preservesNumericInsertionOrder = testOrder(['z', 1, 'a', '3', 2]);
Eif (supportsDescriptors) {
var fastkey = function fastkey(key, skipInsertionOrderCheck) {
if (!skipInsertionOrderCheck && !preservesInsertionOrder) {
return null;
}
if (isNullOrUndefined(key)) {
return '^' + ES.ToString(key);
} else if (typeof key === 'string') {
return '$' + key;
} else if (typeof key === 'number') {
// note that -0 will get coerced to "0" when used as a property key
if (!preservesNumericInsertionOrder) {
return 'n' + key;
}
return key;
} else if (typeof key === 'boolean') {
return 'b' + key;
}
return null;
};
var emptyObject = function emptyObject() {
// accomodate some older not-quite-ES5 browsers
return Object.create ? Object.create(null) : {};
};
var addIterableToMap = function addIterableToMap(MapConstructor, map, iterable) {
if (isArray(iterable) || Type.string(iterable)) {
_forEach(iterable, function (entry) {
if (!ES.TypeIsObject(entry)) {
throw new TypeError('Iterator value ' + entry + ' is not an entry object');
}
map.set(entry[0], entry[1]);
});
} else if (iterable instanceof MapConstructor) {
_call(MapConstructor.prototype.forEach, iterable, function (value, key) {
map.set(key, value);
});
} else {
var iter, adder;
if (!isNullOrUndefined(iterable)) {
adder = map.set;
if (!ES.IsCallable(adder)) { throw new TypeError('bad map'); }
iter = ES.GetIterator(iterable);
}
if (typeof iter !== 'undefined') {
while (true) {
var next = ES.IteratorStep(iter);
if (next === false) { break; }
var nextItem = next.value;
try {
if (!ES.TypeIsObject(nextItem)) {
throw new TypeError('Iterator value ' + nextItem + ' is not an entry object');
}
_call(adder, map, nextItem[0], nextItem[1]);
} catch (e) {
ES.IteratorClose(iter, true);
throw e;
}
}
}
}
};
var addIterableToSet = function addIterableToSet(SetConstructor, set, iterable) {
if (isArray(iterable) || Type.string(iterable)) {
_forEach(iterable, function (value) {
set.add(value);
});
} else if (iterable instanceof SetConstructor) {
_call(SetConstructor.prototype.forEach, iterable, function (value) {
set.add(value);
});
} else {
var iter, adder;
if (!isNullOrUndefined(iterable)) {
adder = set.add;
if (!ES.IsCallable(adder)) { throw new TypeError('bad set'); }
iter = ES.GetIterator(iterable);
}
if (typeof iter !== 'undefined') {
while (true) {
var next = ES.IteratorStep(iter);
if (next === false) { break; }
var nextValue = next.value;
try {
_call(adder, set, nextValue);
} catch (e) {
ES.IteratorClose(iter, true);
throw e;
}
}
}
}
};
var collectionShims = {
Map: (function () {
var empty = {};
var MapEntry = function MapEntry(key, value) {
this.key = key;
this.value = value;
this.next = null;
this.prev = null;
};
MapEntry.prototype.isRemoved = function isRemoved() {
return this.key === empty;
};
var isMap = function isMap(map) {
return !!map._es6map;
};
var requireMapSlot = function requireMapSlot(map, method) {
if (!ES.TypeIsObject(map) || !isMap(map)) {
throw new TypeError('Method Map.prototype.' + method + ' called on incompatible receiver ' + ES.ToString(map));
}
};
var MapIterator = function MapIterator(map, kind) {
requireMapSlot(map, '[[MapIterator]]');
defineProperty(this, 'head', map._head);
defineProperty(this, 'i', this.head);
defineProperty(this, 'kind', kind);
};
MapIterator.prototype = {
isMapIterator: true,
next: function next() {
if (!this.isMapIterator) {
throw new TypeError('Not a MapIterator');
}
var i = this.i;
var kind = this.kind;
var head = this.head;
if (typeof this.i === 'undefined') {
return iteratorResult();
}
while (i.isRemoved() && i !== head) {
// back up off of removed entries
i = i.prev;
}
// advance to next unreturned element.
var result;
while (i.next !== head) {
i = i.next;
if (!i.isRemoved()) {
if (kind === 'key') {
result = i.key;
} else if (kind === 'value') {
result = i.value;
} else {
result = [i.key, i.value];
}
this.i = i;
return iteratorResult(result);
}
}
// once the iterator is done, it is done forever.
this.i = void 0;
return iteratorResult();
}
};
addIterator(MapIterator.prototype);
var Map$prototype;
var MapShim = function Map() {
if (!(this instanceof Map)) {
throw new TypeError('Constructor Map requires "new"');
}
if (this && this._es6map) {
throw new TypeError('Bad construction');
}
var map = emulateES6construct(this, Map, Map$prototype, {
_es6map: true,
_head: null,
_map: OrigMap ? new OrigMap() : null,
_size: 0,
_storage: emptyObject()
});
var head = new MapEntry(null, null);
// circular doubly-linked list.
/* eslint no-multi-assign: 1 */
head.next = head.prev = head;
map._head = head;
// Optionally initialize map from iterable
if (arguments.length > 0) {
addIterableToMap(Map, map, arguments[0]);
}
return map;
};
Map$prototype = MapShim.prototype;
Value.getter(Map$prototype, 'size', function () {
if (typeof this._size === 'undefined') {
throw new TypeError('size method called on incompatible Map');
}
return this._size;
});
defineProperties(Map$prototype, {
get: function get(key) {
requireMapSlot(this, 'get');
var entry;
var fkey = fastkey(key, true);
if (fkey !== null) {
// fast O(1) path
entry = this._storage[fkey];
if (entry) {
return entry.value;
}
return;
}
if (this._map) {
// fast object key path
entry = origMapGet.call(this._map, key);
if (entry) {
return entry.value;
}
return;
}
var head = this._head;
var i = head;
while ((i = i.next) !== head) {
if (ES.SameValueZero(i.key, key)) {
return i.value;
}
}
},
has: function has(key) {
requireMapSlot(this, 'has');
var fkey = fastkey(key, true);
if (fkey !== null) {
// fast O(1) path
return typeof this._storage[fkey] !== 'undefined';
}
if (this._map) {
// fast object key path
return origMapHas.call(this._map, key);
}
var head = this._head;
var i = head;
while ((i = i.next) !== head) {
if (ES.SameValueZero(i.key, key)) {
return true;
}
}
return false;
},
set: function set(key, value) {
requireMapSlot(this, 'set');
var head = this._head;
var i = head;
var entry;
var fkey = fastkey(key, true);
if (fkey !== null) {
// fast O(1) path
if (typeof this._storage[fkey] !== 'undefined') {
this._storage[fkey].value = value;
return this;
}
entry = this._storage[fkey] = new MapEntry(key, value); /* eslint no-multi-assign: 1 */
i = head.prev;
// fall through
} else if (this._map) {
// fast object key path
if (origMapHas.call(this._map, key)) {
origMapGet.call(this._map, key).value = value;
} else {
entry = new MapEntry(key, value);
origMapSet.call(this._map, key, entry);
i = head.prev;
// fall through
}
}
while ((i = i.next) !== head) {
if (ES.SameValueZero(i.key, key)) {
i.value = value;
return this;
}
}
entry = entry || new MapEntry(key, value);
if (ES.SameValue(-0, key)) {
entry.key = +0; // coerce -0 to +0 in entry
}
entry.next = this._head;
entry.prev = this._head.prev;
entry.prev.next = entry;
entry.next.prev = entry;
this._size += 1;
return this;
},
'delete': function (key) {
requireMapSlot(this, 'delete');
var head = this._head;
var i = head;
var fkey = fastkey(key, true);
if (fkey !== null) {
// fast O(1) path
if (typeof this._storage[fkey] === 'undefined') {
return false;
}
i = this._storage[fkey].prev;
delete this._storage[fkey];
// fall through
} else if (this._map) {
// fast object key path
if (!origMapHas.call(this._map, key)) {
return false;
}
i = origMapGet.call(this._map, key).prev;
origMapDelete.call(this._map, key);
// fall through
}
while ((i = i.next) !== head) {
if (ES.SameValueZero(i.key, key)) {
i.key = empty;
i.value = empty;
i.prev.next = i.next;
i.next.prev = i.prev;
this._size -= 1;
return true;
}
}
return false;
},
clear: function clear() {
/* eslint no-multi-assign: 1 */
requireMapSlot(this, 'clear');
this._map = OrigMap ? new OrigMap() : null;
this._size = 0;
this._storage = emptyObject();
var head = this._head;
var i = head;
var p = i.next;
while ((i = p) !== head) {
i.key = empty;
i.value = empty;
p = i.next;
i.next = i.prev = head;
}
head.next = head.prev = head;
},
keys: function keys() {
requireMapSlot(this, 'keys');
return new MapIterator(this, 'key');
},
values: function values() {
requireMapSlot(this, 'values');
return new MapIterator(this, 'value');
},
entries: function entries() {
requireMapSlot(this, 'entries');
return new MapIterator(this, 'key+value');
},
forEach: function forEach(callback) {
requireMapSlot(this, 'forEach');
var context = arguments.length > 1 ? arguments[1] : null;
var it = this.entries();
for (var entry = it.next(); !entry.done; entry = it.next()) {
if (context) {
_call(callback, context, entry.value[1], entry.value[0], this);
} else {
callback(entry.value[1], entry.value[0], this);
}
}
}
});
addIterator(Map$prototype, Map$prototype.entries);
return MapShim;
}()),
Set: (function () {
var isSet = function isSet(set) {
return set._es6set && typeof set._storage !== 'undefined';
};
var requireSetSlot = function requireSetSlot(set, method) {
if (!ES.TypeIsObject(set) || !isSet(set)) {
// https://github.com/paulmillr/es6-shim/issues/176
throw new TypeError('Set.prototype.' + method + ' called on incompatible receiver ' + ES.ToString(set));
}
};
// Creating a Map is expensive. To speed up the common case of
// Sets containing only string or numeric keys, we use an object
// as backing storage and lazily create a full Map only when
// required.
var Set$prototype;
var SetShim = function Set() {
if (!(this instanceof Set)) {
throw new TypeError('Constructor Set requires "new"');
}
if (this && this._es6set) {
throw new TypeError('Bad construction');
}
var set = emulateES6construct(this, Set, Set$prototype, {
_es6set: true,
'[[SetData]]': null,
_storage: emptyObject()
});
if (!set._es6set) {
throw new TypeError('bad set');
}
// Optionally initialize Set from iterable
if (arguments.length > 0) {
addIterableToSet(Set, set, arguments[0]);
}
return set;
};
Set$prototype = SetShim.prototype;
var decodeKey = function (key) {
var k = key;
if (k === '^null') {
return null;
} else if (k === '^undefined') {
return void 0;
}
var first = k.charAt(0);
if (first === '$') {
return _strSlice(k, 1);
} else if (first === 'n') {
return +_strSlice(k, 1);
} else if (first === 'b') {
return k === 'btrue';
}
return +k;
};
// Switch from the object backing storage to a full Map.
var ensureMap = function ensureMap(set) {
if (!set['[[SetData]]']) {
var m = new collectionShims.Map();
set['[[SetData]]'] = m;
_forEach(keys(set._storage), function (key) {
var k = decodeKey(key);
m.set(k, k);
});
set['[[SetData]]'] = m;
}
set._storage = null; // free old backing storage
};
Value.getter(SetShim.prototype, 'size', function () {
requireSetSlot(this, 'size');
if (this._storage) {
return keys(this._storage).length;
}
ensureMap(this);
return this['[[SetData]]'].size;
});
defineProperties(SetShim.prototype, {
has: function has(key) {
requireSetSlot(this, 'has');
var fkey;
if (this._storage && (fkey = fastkey(key)) !== null) {
return !!this._storage[fkey];
}
ensureMap(this);
return this['[[SetData]]'].has(key);
},
add: function add(key) {
requireSetSlot(this, 'add');
var fkey;
if (this._storage && (fkey = fastkey(key)) !== null) {
this._storage[fkey] = true;
return this;
}
ensureMap(this);
this['[[SetData]]'].set(key, key);
return this;
},
'delete': function (key) {
requireSetSlot(this, 'delete');
var fkey;
if (this._storage && (fkey = fastkey(key)) !== null) {
var hasFKey = _hasOwnProperty(this._storage, fkey);
return (delete this._storage[fkey]) && hasFKey;
}
ensureMap(this);
return this['[[SetData]]']['delete'](key);
},
clear: function clear() {
requireSetSlot(this, 'clear');
if (this._storage) {
this._storage = emptyObject();
}
if (this['[[SetData]]']) {
this['[[SetData]]'].clear();
}
},
values: function values() {
requireSetSlot(this, 'values');
ensureMap(this);
return new SetIterator(this['[[SetData]]'].values());
},
entries: function entries() {
requireSetSlot(this, 'entries');
ensureMap(this);
return new SetIterator(this['[[SetData]]'].entries());
},
forEach: function forEach(callback) {
requireSetSlot(this, 'forEach');
var context = arguments.length > 1 ? arguments[1] : null;
var entireSet = this;
ensureMap(entireSet);
this['[[SetData]]'].forEach(function (value, key) {
if (context) {
_call(callback, context, key, key, entireSet);
} else {
callback(key, key, entireSet);
}
});
}
});
defineProperty(SetShim.prototype, 'keys', SetShim.prototype.values, true);
addIterator(SetShim.prototype, SetShim.prototype.values);
var SetIterator = function SetIterator(it) {
defineProperty(this, 'it', it);
};
SetIterator.prototype = {
isSetIterator: true,
next: function next() {
if (!this.isSetIterator) {
throw new TypeError('Not a SetIterator');
}
return this.it.next();
}
};
addIterator(SetIterator.prototype);
return SetShim;
}())
};
var isGoogleTranslate = globals.Set && !Set.prototype['delete'] && Set.prototype.remove && Set.prototype.items && Set.prototype.map && Array.isArray(new Set().keys);
Iif (isGoogleTranslate) {
// special-case force removal of wildly invalid Set implementation in Google Translate iframes
// see https://github.com/paulmillr/es6-shim/issues/438 / https://twitter.com/ljharb/status/849335573114363904
globals.Set = collectionShims.Set;
}
Eif (globals.Map || globals.Set) {
// Safari 8, for example, doesn't accept an iterable.
var mapAcceptsArguments = valueOrFalseIfThrows(function () { return new Map([[1, 2]]).get(1) === 2; });
Iif (!mapAcceptsArguments) {
globals.Map = function Map() {
if (!(this instanceof Map)) {
throw new TypeError('Constructor Map requires "new"');
}
var m = new OrigMap();
if (arguments.length > 0) {
addIterableToMap(Map, m, arguments[0]);
}
delete m.constructor;
Object.setPrototypeOf(m, globals.Map.prototype);
return m;
};
globals.Map.prototype = create(OrigMap.prototype);
defineProperty(globals.Map.prototype, 'constructor', globals.Map, true);
Value.preserveToString(globals.Map, OrigMap);
}
var testMap = new Map();
var mapUsesSameValueZero = (function () {
// Chrome 38-42, node 0.11/0.12, iojs 1/2 also have a bug when the Map has a size > 4
var m = new Map([[1, 0], [2, 0], [3, 0], [4, 0]]);
m.set(-0, m);
return m.get(0) === m && m.get(-0) === m && m.has(0) && m.has(-0);
}());
var mapSupportsChaining = testMap.set(1, 2) === testMap;
Iif (!mapUsesSameValueZero || !mapSupportsChaining) {
overrideNative(Map.prototype, 'set', function set(k, v) {
_call(origMapSet, this, k === 0 ? 0 : k, v);
return this;
});
}
Iif (!mapUsesSameValueZero) {
defineProperties(Map.prototype, {
get: function get(k) {
return _call(origMapGet, this, k === 0 ? 0 : k);
},
has: function has(k) {
return _call(origMapHas, this, k === 0 ? 0 : k);
}
}, true);
Value.preserveToString(Map.prototype.get, origMapGet);
Value.preserveToString(Map.prototype.has, origMapHas);
}
var testSet = new Set();
var setUsesSameValueZero = Set.prototype['delete'] && Set.prototype.add && Set.prototype.has && (function (s) {
s['delete'](0);
s.add(-0);
return !s.has(0);
}(testSet));
var setSupportsChaining = testSet.add(1) === testSet;
Eif (!setUsesSameValueZero || !setSupportsChaining) {
var origSetAdd = Set.prototype.add;
Set.prototype.add = function add(v) {
_call(origSetAdd, this, v === 0 ? 0 : v);
return this;
};
Value.preserveToString(Set.prototype.add, origSetAdd);
}
Eif (!setUsesSameValueZero) {
var origSetHas = Set.prototype.has;
Set.prototype.has = function has(v) {
return _call(origSetHas, this, v === 0 ? 0 : v);
};
Value.preserveToString(Set.prototype.has, origSetHas);
var origSetDel = Set.prototype['delete'];
Set.prototype['delete'] = function SetDelete(v) {
return _call(origSetDel, this, v === 0 ? 0 : v);
};
Value.preserveToString(Set.prototype['delete'], origSetDel);
}
var mapSupportsSubclassing = supportsSubclassing(globals.Map, function (M) {
var m = new M([]);
// Firefox 32 is ok with the instantiating the subclass but will
// throw when the map is used.
m.set(42, 42);
return m instanceof M;
});
// without Object.setPrototypeOf, subclassing is not possible
var mapFailsToSupportSubclassing = Object.setPrototypeOf && !mapSupportsSubclassing;
var mapRequiresNew = (function () {
try {
return !(globals.Map() instanceof globals.Map);
} catch (e) {
return e instanceof TypeError;
}
}());
Iif (globals.Map.length !== 0 || mapFailsToSupportSubclassing || !mapRequiresNew) {
globals.Map = function Map() {
if (!(this instanceof Map)) {
throw new TypeError('Constructor Map requires "new"');
}
var m = new OrigMap();
if (arguments.length > 0) {
addIterableToMap(Map, m, arguments[0]);
}
delete m.constructor;
Object.setPrototypeOf(m, Map.prototype);
return m;
};
globals.Map.prototype = OrigMap.prototype;
defineProperty(globals.Map.prototype, 'constructor', globals.Map, true);
Value.preserveToString(globals.Map, OrigMap);
}
var setSupportsSubclassing = supportsSubclassing(globals.Set, function (S) {
var s = new S([]);
s.add(42, 42);
return s instanceof S;
});
// without Object.setPrototypeOf, subclassing is not possible
var setFailsToSupportSubclassing = Object.setPrototypeOf && !setSupportsSubclassing;
var setRequiresNew = (function () {
try {
return !(globals.Set() instanceof globals.Set);
} catch (e) {
return e instanceof TypeError;
}
}());
Iif (globals.Set.length !== 0 || setFailsToSupportSubclassing || !setRequiresNew) {
var OrigSet = globals.Set;
globals.Set = function Set() {
if (!(this instanceof Set)) {
throw new TypeError('Constructor Set requires "new"');
}
var s = new OrigSet();
if (arguments.length > 0) {
addIterableToSet(Set, s, arguments[0]);
}
delete s.constructor;
Object.setPrototypeOf(s, Set.prototype);
return s;
};
globals.Set.prototype = OrigSet.prototype;
defineProperty(globals.Set.prototype, 'constructor', globals.Set, true);
Value.preserveToString(globals.Set, OrigSet);
}
var newMap = new globals.Map();
var mapIterationThrowsStopIterator = !valueOrFalseIfThrows(function () {
return newMap.keys().next().done;
});
/*
- In Firefox < 23, Map#size is a function.
- In all current Firefox, Set#entries/keys/values & Map#clear do not exist
- https://bugzilla.mozilla.org/show_bug.cgi?id=869996
- In Firefox 24, Map and Set do not implement forEach
- In Firefox 25 at least, Map and Set are callable without "new"
*/
Iif (
typeof globals.Map.prototype.clear !== 'function'
|| new globals.Set().size !== 0
|| newMap.size !== 0
|| typeof globals.Map.prototype.keys !== 'function'
|| typeof globals.Set.prototype.keys !== 'function'
|| typeof globals.Map.prototype.forEach !== 'function'
|| typeof globals.Set.prototype.forEach !== 'function'
|| isCallableWithoutNew(globals.Map)
|| isCallableWithoutNew(globals.Set)
|| typeof newMap.keys().next !== 'function' // Safari 8
|| mapIterationThrowsStopIterator // Firefox 25
|| !mapSupportsSubclassing
) {
defineProperties(globals, {
Map: collectionShims.Map,
Set: collectionShims.Set
}, true);
}
Iif (globals.Set.prototype.keys !== globals.Set.prototype.values) {
// Fixed in WebKit with https://bugs.webkit.org/show_bug.cgi?id=144190
defineProperty(globals.Set.prototype, 'keys', globals.Set.prototype.values, true);
}
// Shim incomplete iterator implementations.
addIterator(Object.getPrototypeOf((new globals.Map()).keys()));
addIterator(Object.getPrototypeOf((new globals.Set()).keys()));
Iif (functionsHaveNames && globals.Set.prototype.has.name !== 'has') {
// Microsoft Edge v0.11.10074.0 is missing a name on Set#has
var anonymousSetHas = globals.Set.prototype.has;
overrideNative(globals.Set.prototype, 'has', function has(key) {
return _call(anonymousSetHas, this, key);
});
}
}
defineProperties(globals, collectionShims);
addDefaultSpecies(globals.Map);
addDefaultSpecies(globals.Set);
}
var throwUnlessTargetIsObject = function throwUnlessTargetIsObject(target) {
if (!ES.TypeIsObject(target)) {
throw new TypeError('target must be an object');
}
};
// Some Reflect methods are basically the same as
// those on the Object global, except that a TypeError is thrown if
// target isn't an object. As well as returning a boolean indicating
// the success of the operation.
var ReflectShims = {
// Apply method in a functional form.
apply: function apply() {
return ES.Call(ES.Call, null, arguments);
},
// New operator in a functional form.
construct: function construct(constructor, args) {
if (!ES.IsConstructor(constructor)) {
throw new TypeError('First argument must be a constructor.');
}
var newTarget = arguments.length > 2 ? arguments[2] : constructor;
if (!ES.IsConstructor(newTarget)) {
throw new TypeError('new.target must be a constructor.');
}
return ES.Construct(constructor, args, newTarget, 'internal');
},
// When deleting a non-existent or configurable property,
// true is returned.
// When attempting to delete a non-configurable property,
// it will return false.
deleteProperty: function deleteProperty(target, key) {
throwUnlessTargetIsObject(target);
if (supportsDescriptors) {
var desc = Object.getOwnPropertyDescriptor(target, key);
if (desc && !desc.configurable) {
return false;
}
}
// Will return true.
return delete target[key];
},
has: function has(target, key) {
throwUnlessTargetIsObject(target);
return key in target;
}
};
Eif (Object.getOwnPropertyNames) {
Object.assign(ReflectShims, {
// Basically the result of calling the internal [[OwnPropertyKeys]].
// Concatenating propertyNames and propertySymbols should do the trick.
// This should continue to work together with a Symbol shim
// which overrides Object.getOwnPropertyNames and implements
// Object.getOwnPropertySymbols.
ownKeys: function ownKeys(target) {
throwUnlessTargetIsObject(target);
var keys = Object.getOwnPropertyNames(target);
if (ES.IsCallable(Object.getOwnPropertySymbols)) {
_pushApply(keys, Object.getOwnPropertySymbols(target));
}
return keys;
}
});
}
var callAndCatchException = function ConvertExceptionToBoolean(func) {
return !throwsError(func);
};
Eif (Object.preventExtensions) {
Object.assign(ReflectShims, {
isExtensible: function isExtensible(target) {
throwUnlessTargetIsObject(target);
return Object.isExtensible(target);
},
preventExtensions: function preventExtensions(target) {
throwUnlessTargetIsObject(target);
return callAndCatchException(function () {
return Object.preventExtensions(target);
});
}
});
}
Eif (supportsDescriptors) {
var internalGet = function get(target, key, receiver) {
var desc = Object.getOwnPropertyDescriptor(target, key);
if (!desc) {
var parent = Object.getPrototypeOf(target);
if (parent === null) {
return void 0;
}
return internalGet(parent, key, receiver);
}
if ('value' in desc) {
return desc.value;
}
if (desc.get) {
return ES.Call(desc.get, receiver);
}
return void 0;
};
var internalSet = function set(target, key, value, receiver) {
var desc = Object.getOwnPropertyDescriptor(target, key);
if (!desc) {
var parent = Object.getPrototypeOf(target);
if (parent !== null) {
return internalSet(parent, key, value, receiver);
}
desc = {
value: void 0,
writable: true,
enumerable: true,
configurable: true
};
}
if ('value' in desc) {
if (!desc.writable) {
return false;
}
if (!ES.TypeIsObject(receiver)) {
return false;
}
var existingDesc = Object.getOwnPropertyDescriptor(receiver, key);
if (existingDesc) {
return Reflect.defineProperty(receiver, key, {
value: value
});
}
return Reflect.defineProperty(receiver, key, {
value: value,
writable: true,
enumerable: true,
configurable: true
});
}
if (desc.set) {
_call(desc.set, receiver, value);
return true;
}
return false;
};
Object.assign(ReflectShims, {
defineProperty: function defineProperty(target, propertyKey, attributes) {
throwUnlessTargetIsObject(target);
return callAndCatchException(function () {
return Object.defineProperty(target, propertyKey, attributes);
});
},
getOwnPropertyDescriptor: function getOwnPropertyDescriptor(target, propertyKey) {
throwUnlessTargetIsObject(target);
return Object.getOwnPropertyDescriptor(target, propertyKey);
},
// Syntax in a functional form.
get: function get(target, key) {
throwUnlessTargetIsObject(target);
var receiver = arguments.length > 2 ? arguments[2] : target;
return internalGet(target, key, receiver);
},
set: function set(target, key, value) {
throwUnlessTargetIsObject(target);
var receiver = arguments.length > 3 ? arguments[3] : target;
return internalSet(target, key, value, receiver);
}
});
}
Eif (Object.getPrototypeOf) {
var objectDotGetPrototypeOf = Object.getPrototypeOf;
ReflectShims.getPrototypeOf = function getPrototypeOf(target) {
throwUnlessTargetIsObject(target);
return objectDotGetPrototypeOf(target);
};
}
Eif (Object.setPrototypeOf && ReflectShims.getPrototypeOf) {
var willCreateCircularPrototype = function (object, lastProto) {
var proto = lastProto;
while (proto) {
if (object === proto) {
return true;
}
proto = ReflectShims.getPrototypeOf(proto);
}
return false;
};
Object.assign(ReflectShims, {
// Sets the prototype of the given object.
// Returns true on success, otherwise false.
setPrototypeOf: function setPrototypeOf(object, proto) {
throwUnlessTargetIsObject(object);
if (proto !== null && !ES.TypeIsObject(proto)) {
throw new TypeError('proto must be an object or null');
}
// If they already are the same, we're done.
if (proto === Reflect.getPrototypeOf(object)) {
return true;
}
// Cannot alter prototype if object not extensible.
if (Reflect.isExtensible && !Reflect.isExtensible(object)) {
return false;
}
// Ensure that we do not create a circular prototype chain.
if (willCreateCircularPrototype(object, proto)) {
return false;
}
Object.setPrototypeOf(object, proto);
return true;
}
});
}
var defineOrOverrideReflectProperty = function (key, shim) {
Iif (!ES.IsCallable(globals.Reflect[key])) {
defineProperty(globals.Reflect, key, shim);
} else {
var acceptsPrimitives = valueOrFalseIfThrows(function () {
globals.Reflect[key](1);
globals.Reflect[key](NaN);
globals.Reflect[key](true);
return true;
});
Iif (acceptsPrimitives) {
overrideNative(globals.Reflect, key, shim);
}
}
};
Object.keys(ReflectShims).forEach(function (key) {
defineOrOverrideReflectProperty(key, ReflectShims[key]);
});
var originalReflectGetProto = globals.Reflect.getPrototypeOf;
Iif (functionsHaveNames && originalReflectGetProto && originalReflectGetProto.name !== 'getPrototypeOf') {
overrideNative(globals.Reflect, 'getPrototypeOf', function getPrototypeOf(target) {
return _call(originalReflectGetProto, globals.Reflect, target);
});
}
Eif (globals.Reflect.setPrototypeOf) {
Iif (valueOrFalseIfThrows(function () {
globals.Reflect.setPrototypeOf(1, {});
return true;
})) {
overrideNative(globals.Reflect, 'setPrototypeOf', ReflectShims.setPrototypeOf);
}
}
Eif (globals.Reflect.defineProperty) {
Eif (!valueOrFalseIfThrows(function () {
var basic = !globals.Reflect.defineProperty(1, 'test', { value: 1 });
// "extensible" fails on Edge 0.12
var extensible = typeof Object.preventExtensions !== 'function' || !globals.Reflect.defineProperty(Object.preventExtensions({}), 'test', {});
return basic && extensible;
})) {
overrideNative(globals.Reflect, 'defineProperty', ReflectShims.defineProperty);
}
}
Eif (globals.Reflect.construct) {
Iif (!valueOrFalseIfThrows(function () {
var F = function F() {};
return globals.Reflect.construct(function () {}, [], F) instanceof F;
})) {
overrideNative(globals.Reflect, 'construct', ReflectShims.construct);
}
}
Iif (String(new Date(NaN)) !== 'Invalid Date') {
var dateToString = Date.prototype.toString;
var shimmedDateToString = function toString() {
var valueOf = +this;
if (valueOf !== valueOf) {
return 'Invalid Date';
}
return ES.Call(dateToString, this);
};
overrideNative(Date.prototype, 'toString', shimmedDateToString);
}
// Annex B HTML methods
// http://www.ecma-international.org/ecma-262/6.0/#sec-additional-properties-of-the-string.prototype-object
var stringHTMLshims = {
anchor: function anchor(name) { return ES.CreateHTML(this, 'a', 'name', name); },
big: function big() { return ES.CreateHTML(this, 'big', '', ''); },
blink: function blink() { return ES.CreateHTML(this, 'blink', '', ''); },
bold: function bold() { return ES.CreateHTML(this, 'b', '', ''); },
fixed: function fixed() { return ES.CreateHTML(this, 'tt', '', ''); },
fontcolor: function fontcolor(color) { return ES.CreateHTML(this, 'font', 'color', color); },
fontsize: function fontsize(size) { return ES.CreateHTML(this, 'font', 'size', size); },
italics: function italics() { return ES.CreateHTML(this, 'i', '', ''); },
link: function link(url) { return ES.CreateHTML(this, 'a', 'href', url); },
small: function small() { return ES.CreateHTML(this, 'small', '', ''); },
strike: function strike() { return ES.CreateHTML(this, 'strike', '', ''); },
sub: function sub() { return ES.CreateHTML(this, 'sub', '', ''); },
sup: function sub() { return ES.CreateHTML(this, 'sup', '', ''); }
};
_forEach(Object.keys(stringHTMLshims), function (key) {
var method = String.prototype[key];
var shouldOverwrite = false;
Eif (ES.IsCallable(method)) {
var output = _call(method, '', ' " ');
var quotesCount = _concat([], output.match(/"/g)).length;
shouldOverwrite = output !== output.toLowerCase() || quotesCount > 2;
} else {
shouldOverwrite = true;
}
Iif (shouldOverwrite) {
overrideNative(String.prototype, key, stringHTMLshims[key]);
}
});
var JSONstringifiesSymbols = (function () {
// Microsoft Edge v0.12 stringifies Symbols incorrectly
Iif (!hasSymbols) { return false; } // Symbols are not supported
var stringify = typeof JSON === 'object' && typeof JSON.stringify === 'function' ? JSON.stringify : null;
Iif (!stringify) { return false; } // JSON.stringify is not supported
Iif (typeof stringify(Symbol()) !== 'undefined') { return true; } // Symbols should become `undefined`
Iif (stringify([Symbol()]) !== '[null]') { return true; } // Symbols in arrays should become `null`
var obj = { a: Symbol() };
obj[Symbol()] = true;
Iif (stringify(obj) !== '{}') { return true; } // Symbol-valued keys *and* Symbol-valued properties should be omitted
return false;
}());
var JSONstringifyAcceptsObjectSymbol = valueOrFalseIfThrows(function () {
// Chrome 45 throws on stringifying object symbols
Iif (!hasSymbols) { return true; } // Symbols are not supported
return JSON.stringify(Object(Symbol())) === '{}' && JSON.stringify([Object(Symbol())]) === '[{}]';
});
Iif (JSONstringifiesSymbols || !JSONstringifyAcceptsObjectSymbol) {
var origStringify = JSON.stringify;
overrideNative(JSON, 'stringify', function stringify(value) {
if (typeof value === 'symbol') { return; }
var replacer;
if (arguments.length > 1) {
replacer = arguments[1];
}
var args = [value];
if (!isArray(replacer)) {
var replaceFn = ES.IsCallable(replacer) ? replacer : null;
var wrappedReplacer = function (key, val) {
var parsedValue = replaceFn ? _call(replaceFn, this, key, val) : val;
if (typeof parsedValue !== 'symbol') {
if (Type.symbol(parsedValue)) {
return assignTo({})(parsedValue);
}
return parsedValue;
}
};
args.push(wrappedReplacer);
} else {
// create wrapped replacer that handles an array replacer?
args.push(replacer);
}
if (arguments.length > 2) {
args.push(arguments[2]);
}
return origStringify.apply(this, args);
});
}
return globals;
}));
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