motion/node_modules/core-js/package.json

motion - moving development forward

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  "description": "Standard library",
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  "homepage": "https://github.com/zloirock/core-js#readme",
  "keywords": [
    "Array generics",
    "Dict",
    "ECMAScript 5",
    "ECMAScript 6",
    "ECMAScript 7",
    "ES5",
    "ES6",
    "ES7",
    "Harmony",
    "Map",
    "Promise",
    "Set",
    "Strawman",
    "Symbol",
    "WeakMap",
    "WeakSet",
    "partial application",
    "setImmediate"
  ],
  "license": "MIT",
  "main": "index.js",
  "name": "core-js",
  "optionalDependencies": {},
  "readme": "# core-js\n\n[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/zloirock/core-js?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![version](https://img.shields.io/npm/v/core-js.svg)](https://www.npmjs.com/package/core-js) [![npm downloads](https://img.shields.io/npm/dm/core-js.svg)](http://npm-stat.com/charts.html?package=core-js&author=&from=2014-11-18&to=2114-11-18) [![Build Status](https://travis-ci.org/zloirock/core-js.png)](https://travis-ci.org/zloirock/core-js) [![devDependency Status](https://david-dm.org/zloirock/core-js/dev-status.svg)](https://david-dm.org/zloirock/core-js#info=devDependencies)\n\nModular compact standard library for JavaScript. Includes polyfills for [ECMAScript 5](#ecmascript-5), [ECMAScript 6](#ecmascript-6): [symbols](#ecmascript-6-symbol), [collections](#ecmascript-6-collections), [iterators](#ecmascript-6-iterators), [promises](#ecmascript-6-promise), [ECMAScript 7 proposals](#ecmascript-7); [setImmediate](#setimmediate), [array generics](#mozilla-javascript-array-generics). Some additional features such as [dictionaries](#dict) or [extended partial application](#partial-application). You can require only standardized features polyfills, use features without global namespace pollution or create a custom build.\n\n[Example](http://goo.gl/mfHYm2):\n```javascript\nArray.from(new Set([1, 2, 3, 2, 1])); // => [1, 2, 3]\n'*'.repeat(10);                       // => '**********'\nPromise.resolve(32).then(log);        // => 32\nsetImmediate(log, 42);                // => 42\n```\n\n[Without global namespace pollution](http://goo.gl/WBhs43):\n```javascript\nvar core = require('core-js/library'); // With a modular system, otherwise use global `core`\ncore.Array.from(new core.Set([1, 2, 3, 2, 1])); // => [1, 2, 3]\ncore.String.repeat('*', 10);                    // => '**********'\ncore.Promise.resolve(32).then(core.log);        // => 32\ncore.setImmediate(core.log, 42);                // => 42\n```\n\n- [Usage](#usage)\n  - [Basic](#basic)\n  - [CommonJS](#commonjs)\n  - [Custom build](#custom-build)\n- [Features](#features)\n  - [ECMAScript 5](#ecmascript-5)\n  - [ECMAScript 6](#ecmascript-6)\n    - [ECMAScript 6: Object](#ecmascript-6-object)\n    - [ECMAScript 6: Function](#ecmascript-6-function)\n    - [ECMAScript 6: Array](#ecmascript-6-array)\n    - [ECMAScript 6: String](#ecmascript-6-string)\n    - [ECMAScript 6: RegExp](#ecmascript-6-regexp)\n    - [ECMAScript 6: Number](#ecmascript-6-number)\n    - [ECMAScript 6: Math](#ecmascript-6-math)\n    - [ECMAScript 6: Symbol](#ecmascript-6-symbol)\n    - [ECMAScript 6: Collections](#ecmascript-6-collections)\n    - [ECMAScript 6: Iterators](#ecmascript-6-iterators)\n    - [ECMAScript 6: Promise](#ecmascript-6-promise)\n    - [ECMAScript 6: Reflect](#ecmascript-6-reflect)\n  - [ECMAScript 7](#ecmascript-7)\n  - [Mozilla JavaScript: Array generics](#mozilla-javascript-array-generics)\n  - [Web standards](#web-standards)\n    - [setTimeout / setInterval](#settimeout--setinterval)\n    - [setImmediate](#setimmediate)\n  - [Non-standard](#non-standard)\n    - [Object](#object)\n    - [Dict](#dict)\n    - [Partial application](#partial-application)\n    - [Number Iterator](#number-iterator)\n    - [Escaping HTML](#escaping-html)\n    - [delay](#delay)\n    - [console](#console)\n- [Missing polyfills](#missing-polyfills)\n- [Changelog](./CHANGELOG.md)\n\n## Usage\n### Basic\n```\nnpm i core-js\nbower install core.js\n```\n\n```javascript\n// Default\nrequire('core-js');\n// Without global namespace pollution\nvar core = require('core-js/library');\n// Shim only\nrequire('core-js/shim');\n```\nIf you need complete build for browser, use builds from `core-js/client` path:  [default](https://raw.githack.com/zloirock/core-js/master/client/core.min.js), [without global namespace pollution](https://raw.githack.com/zloirock/core-js/master/client/library.min.js), [shim only](https://raw.githack.com/zloirock/core-js/master/client/shim.min.js).\n\nWarning: if you uses `core-js` with the extension of native objects, require all needed `core-js` modules at the beginning of entry point of your application, otherwise maybe conflicts.\n\n### CommonJS\nYou can require only needed modules.\n\n```js\nrequire('core-js/es5'); // if you need support IE8-\nrequire('core-js/fn/set');\nrequire('core-js/fn/array/from');\nrequire('core-js/fn/array/find-index');\nArray.from(new Set([1, 2, 3, 2, 1])); // => [1, 2, 3]\n[1, 2, NaN, 3, 4].findIndex(isNaN);   // => 2\n\n// or, w/o global namespace pollution:\n\nvar core      = require('core-js/library/es5'); // if you need support IE8-\nvar Set       = require('core-js/library/fn/set');\nvar from      = require('core-js/library/fn/array/from');\nvar findIndex = require('core-js/library/fn/array/find-index');\nfrom(new Set([1, 2, 3, 2, 1]));      // => [1, 2, 3]\nfindIndex([1, 2, NaN, 3, 4], isNaN); // => 2\n```\nAvailable entry points for methods / constructors, as above examples, excluding features from [`es5`](#ecmascript-5) module (this module requires completely in ES3 environment before all other modules).\n\nAvailable namespaces: for example, `core-js/es6/array` (`core-js/library/es6/array`) contains all [ES6 `Array` features](#ecmascript-6-array), `core-js/es6` (`core-js/library/es6`) contains all ES6 features.\n\n### Custom build\n```\nnpm i core-js && cd node_modules/core-js && npm i\nnpm run grunt build:core.dict,es6 -- --blacklist=es6.promise,es6.math --library=on --path=custom uglify\n```\nWhere `core.dict` and `es6` are modules (namespaces) names, which will be added to the build, `es6.promise` and `es6.math` are modules (namespaces) names, which will be excluded from the build, `--library=on` is flag for build without global namespace pollution and `custom` is target file name.\n\nAvailable namespaces: for example, `es6.array` contains [ES6 `Array` features](#ecmascript-6-array), `es6` contains all modules whose names start with `es6`.\n\nAvailable custom build from js code (required `webpack`):\n```js\nrequire('core-js/build')({\n  modules: ['es6', 'core.dict'], // modules / namespaces\n  blacklist: ['es6.reflect'],    // blacklist of modules / namespaces\n  library: false,                // flag for build without global namespace pollution\n}, function(err, code){          // callback\n  // ...\n});\n```\n## Features:\n### ECMAScript 5\nModule [`es5`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es5.js), nothing new - without examples.\n```javascript\nObject\n  .create(proto | null, descriptors?) -> object\n  .getPrototypeOf(object) -> proto | null\n  .defineProperty(target, key, desc) -> target, cap for ie8-\n  .defineProperties(target, descriptors) -> target, cap for ie8-\n  .getOwnPropertyDescriptor(object, key) -> desc\n  .getOwnPropertyNames(object) -> array\n  .keys(object) -> array\nArray\n  .isArray(var) -> bool\n  #slice(start?, end?) -> array, fix for ie7-\n  #join(string = ',') -> string, fix for ie7-\n  #indexOf(var, from?) -> int\n  #lastIndexOf(var, from?) -> int\n  #every(fn(val, index, @), that) -> bool\n  #some(fn(val, index, @), that) -> bool\n  #forEach(fn(val, index, @), that) -> void\n  #map(fn(val, index, @), that) -> array\n  #filter(fn(val, index, @), that) -> array\n  #reduce(fn(memo, val, index, @), memo?) -> var\n  #reduceRight(fn(memo, val, index, @), memo?) -> var\nFunction\n  #bind(object, ...args) -> boundFn(...args)\nDate\n  .now() -> int\n  #toISOString() -> string\n```\nSome features moved to [another modules / namespaces](#ecmascript-6), but available as part of `es5` namespace too:\n```js\nObject\n  .seal(object) -> object, cap for ie8-\n  .freeze(object) -> object, cap for ie8-\n  .preventExtensions(object) -> object, cap for ie8-\n  .isSealed(object) -> bool, cap for ie8-\n  .isFrozen(object) -> bool, cap for ie8-\n  .isExtensible(object) -> bool, cap for ie8-\nString\n  #trim() -> str\n```\n\n### ECMAScript 6\n#### ECMAScript 6: Object\nModules [`es6.object.assign`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.assign.js), [`es6.object.is`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.is.js), [`es6.object.set-prototype-of`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.set-prototype-of.js) and [`es6.object.to-string`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.to-string.js).\n```javascript\nObject\n  .assign(target, ...src) -> target\n  .is(a, b) -> bool\n  .setPrototypeOf(target, proto | null) -> target (required __proto__ - IE11+)\n  #toString() -> string, ES6 fix: @@toStringTag support\n```\n[Example](http://goo.gl/VzmY3j):\n```javascript\nvar foo = {q: 1, w: 2}\n  , bar = {e: 3, r: 4}\n  , baz = {t: 5, y: 6};\nObject.assign(foo, bar, baz); // => foo = {q: 1, w: 2, e: 3, r: 4, t: 5, y: 6}\n\nObject.is(NaN, NaN); // => true\nObject.is(0, -0);    // => false\nObject.is(42, 42);   // => true\nObject.is(42, '42'); // => false\n\nfunction Parent(){}\nfunction Child(){}\nObject.setPrototypeOf(Child.prototype, Parent.prototype);\nnew Child instanceof Child;  // => true\nnew Child instanceof Parent; // => true\n\nvar O = {};\nO[Symbol.toStringTag] = 'Foo';\n'' + O; // => '[object Foo]'\n```\nIn ES6 most `Object` static methods should work with primitives. Modules [`es6.object.freeze`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.freeze.js), [`es6.object.seal`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.seal.js), [`es6.object.prevent-extensions`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.prevent-extensions.js), [`es6.object.is-frozen`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.is-frozen.js), [`es6.object.is-sealed`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.is-sealed.js), [`es6.object.is-extensible`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.is-extensible.js), [`es6.object.get-own-property-descriptor`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.get-own-property-descriptor.js), [`es6.object.get-prototype-of`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.get-prototype-of.js), [`es6.object.keys`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.keys.js), [`es6.object.get-own-property-names`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.object.get-own-property-names.js).\n```javascript\nObject\n  .freeze(var) -> var\n  .seal(var) -> var\n  .preventExtensions(var) -> var\n  .isFrozen(var) -> bool\n  .isSealed(var) -> bool\n  .isExtensible(var) -> bool\n  .getOwnPropertyDescriptor(var, key) -> desc | undefined\n  .getPrototypeOf(var) -> object | null\n  .keys(var) -> array\n  .getOwnPropertyNames(var) -> array\n```\n[Example](http://goo.gl/35lPSi):\n```javascript\nObject.keys('qwe'); // => ['0', '1', '2']\nObject.getPrototypeOf('qwe') === String.prototype; // => true\n```\n#### ECMAScript 6: Function\nModules [`es6.function.name`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.function.name.js) and [`es6.function.has-instance`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.function.has-instance.js).\n```javascript\nFunction\n  #name -> string (IE9+)\n  #@@hasInstance(var) -> bool\n```\n[Example](http://goo.gl/zqu3Wp):\n```javascript\n(function foo(){}).name // => 'foo'\n```\n#### ECMAScript 6: Array\nModules [`es6.array.from`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.array.from.js), [`es6.array.of`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.array.of.js), [`es6.array.copy-within`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.array.copy-within.js), [`es6.array.fill`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.array.fill.js), [`es6.array.find`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.array.find.js) and [`es6.array.find-index`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.array.find-index.js).\n```javascript\nArray\n  .from(iterable | array-like, mapFn(val, index)?, that) -> array\n  .of(...args) -> array\n  #copyWithin(target = 0, start = 0, end = @length) -> @\n  #fill(val, start = 0, end = @length) -> @\n  #find(fn(val, index, @), that) -> val\n  #findIndex(fn(val, index, @), that) -> index\n  #@@unscopables -> object (cap)\n```\n[Example](http://goo.gl/nxmJTe):\n```javascript\nArray.from(new Set([1, 2, 3, 2, 1]));      // => [1, 2, 3]\nArray.from({0: 1, 1: 2, 2: 3, length: 3}); // => [1, 2, 3]\nArray.from('123', Number);                 // => [1, 2, 3]\nArray.from('123', function(it){\n  return it * it;\n});                                        // => [1, 4, 9]\n\nArray.of(1);       // => [1]\nArray.of(1, 2, 3); // => [1, 2, 3]\n\nfunction isOdd(val){\n  return val % 2;\n}\n[4, 8, 15, 16, 23, 42].find(isOdd);      // => 15\n[4, 8, 15, 16, 23, 42].findIndex(isOdd); // => 2\n[4, 8, 15, 16, 23, 42].find(isNaN);      // => undefined\n[4, 8, 15, 16, 23, 42].findIndex(isNaN); // => -1\n\nArray(5).fill(42); // => [42, 42, 42, 42, 42]\n\n[1, 2, 3, 4, 5].copyWithin(0, 3); // => [4, 5, 3, 4, 5]\n```\n#### ECMAScript 6: String\nModules [`es6.string.from-code-point`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.from-code-point.js), [`es6.string.raw`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.raw.js), [`es6.string.code-point-at`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.code-point-at.js), [`es6.string.ends-with`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.ends-with.js), [`es6.string.includes`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.includes.js), [`es6.string.repeat`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.repeat.js), [`es6.string.starts-with`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.starts-with.js) and [`es6.string.trim`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.trim.js).\n```javascript\nString\n  .fromCodePoint(...codePoints) -> str\n  .raw({raw}, ...substitutions) -> str\n  #includes(str, from?) -> bool\n  #startsWith(str, from?) -> bool\n  #endsWith(str, from?) -> bool\n  #repeat(num) -> str\n  #codePointAt(pos) -> uint\n  #trim() -> str, ES6 fix\n```\n[Examples](http://goo.gl/RMyFBo):\n```javascript\n'foobarbaz'.includes('bar');      // => true\n'foobarbaz'.includes('bar', 4);   // => false\n'foobarbaz'.startsWith('foo');    // => true\n'foobarbaz'.startsWith('bar', 3); // => true\n'foobarbaz'.endsWith('baz');      // => true\n'foobarbaz'.endsWith('bar', 6);   // => true\n\n'string'.repeat(3); // => 'stringstringstring'\n\n'𠮷'.codePointAt(0); // => 134071\nString.fromCodePoint(97, 134071, 98); // => 'a𠮷b'\n\nvar name = 'Bob';\nString.raw`Hi\\n${name}!`;           // => 'Hi\\\\nBob!' (ES6 template string syntax)\nString.raw({raw: 'test'}, 0, 1, 2); // => 't0e1s2t'\n```\n#### ECMAScript 6: RegExp\nModules [`es6.regexp.constructor`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.regexp.constructor.js) and [`es6.regexp.flags`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.regexp.flags.js).\n\nSupport well-known [symbols](#ecmascript-6-symbol) `@@match`, `@@replace`, `@@search` and `@@split`, modules [`es6.regexp.match`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.regexp.match.js), [`es6.regexp.replace`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.regexp.replace.js), [`es6.regexp.search`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.regexp.search.js) and [`es6.regexp.split`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.regexp.split.js).\n```\nString\n  #match(tpl) -> var, ES6 fix for support @@match\n  #replace(tpl, replacer) -> var, ES6 fix for support @@replace\n  #search(tpl) -> var, ES6 fix for support @@search\n  #split(tpl, limit) -> var, ES6 fix for support @@split\n[new] RegExp(pattern, flags?) -> regexp, ES6 fix: can alter flags (IE9+)\n  #flags -> str (IE9+)\n  #@@match(str) -> array | null\n  #@@replace(str, replacer) -> string\n  #@@search(str) -> index\n  #@@split(str, limit) -> array\n```\n[Examples](http://goo.gl/vLV603):\n```javascript\nRegExp(/./g, 'm'); // => /./m\n\n/foo/.flags;    // => ''\n/foo/gim.flags; // => 'gim'\n\n'foo'.match({[Symbol.match]: _ => 1});     // => 1\n'foo'.replace({[Symbol.replace]: _ => 2}); // => 2\n'foo'.search({[Symbol.search]: _ => 3});   // => 3\n'foo'.split({[Symbol.split]: _ => 4});     // => 4\n```\n#### ECMAScript 6: Number\nModule [`es6.number.constructor`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.constructor.js). `Number` constructor support binary and octal literals, [example](http://goo.gl/jRd6b3):\n```javascript\nNumber('0b1010101'); // => 85\nNumber('0o7654321'); // => 2054353\n```\n`Number`: modules [`es6.number.epsilon`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.epsilon.js), [`es6.number.is-finite`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.is-finite.js), [`es6.number.is-integer`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.is-integer.js), [`es6.number.is-nan`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.is-nan.js), [`es6.number.is-safe-integer`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.is-safe-integer.js), [`es6.number.max-safe-integer`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.max-safe-integer.js), [`es6.number.min-safe-integer`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.min-safe-integer.js), [`es6.number.parse-float`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.parse-float.js), [`es6.number.parse-int`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.number.parse-int.js).\n```javascript\n[new] Number(var) -> number | number object\n  .EPSILON -> num\n  .isFinite(num) -> bool\n  .isInteger(num) -> bool\n  .isNaN(num) -> bool\n  .isSafeInteger(num) -> bool\n  .MAX_SAFE_INTEGER -> int\n  .MIN_SAFE_INTEGER -> int\n  .parseFloat(str) -> num\n  .parseInt(str) -> int\n```\n#### ECMAScript 6: Math\n`Math`: modules [`es6.math.acosh`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.acosh.js), [`es6.math.asinh`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.asinh.js), [`es6.math.atanh`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.atanh.js), [`es6.math.cbrt`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.cbrt.js), [`es6.math.clz32`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.clz32.js), [`es6.math.cosh`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.cosh.js), [`es6.math.expm1`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.expm1.js), [`es6.math.fround`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.fround.js), [`es6.math.hypot`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.hypot.js), [`es6.math.imul`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.imul.js), [`es6.math.log10`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.log10.js), [`es6.math.log1p`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.log1p.js), [`es6.math.log2`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.log2.js), [`es6.math.sign`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.sign.js), [`es6.math.sinh`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.sinh.js), [`es6.math.tanh`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.tanh.js), [`es6.math.trunc`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.math.trunc.js).\n```javascript\nMath\n  .acosh(num) -> num\n  .asinh(num) -> num\n  .atanh(num) -> num\n  .cbrt(num) -> num\n  .clz32(num) -> uint\n  .cosh(num) -> num\n  .expm1(num) -> num\n  .fround(num) -> num\n  .hypot(...args) -> num\n  .imul(num, num) -> int\n  .log1p(num) -> num\n  .log10(num) -> num\n  .log2(num) -> num\n  .sign(num) -> 1 | -1 | 0 | -0 | NaN\n  .sinh(num) -> num\n  .tanh(num) -> num\n  .trunc(num) -> num\n```\n\n#### ECMAScript 6: Symbol\nModule [`es6.symbol`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.symbol.js).\n```javascript\nSymbol(description?) -> symbol\n  .hasInstance -> @@hasInstance\n  .isConcatSpreadable -> @@isConcatSpreadable\n  .iterator -> @@iterator\n  .match -> @@match\n  .replace -> @@replace\n  .search -> @@search\n  .species -> @@species\n  .split -> @@split\n  .toPrimitive -> @@toPrimitive\n  .toStringTag -> @@toStringTag\n  .unscopables -> @@unscopables\n  .for(key) -> symbol\n  .keyFor(symbol) -> key\n  .useSimple() -> void\n  .useSetter() -> void\nObject\n  .getOwnPropertySymbols(object) -> array\n```\nAlso wrapped some methods for correct work with `Symbol` polyfill.\n```js\nObject\n  .create(proto | null, descriptors?) -> object\n  .defineProperty(target, key, desc) -> target\n  .defineProperties(target, descriptors) -> target\n  .getOwnPropertyDescriptor(var, key) -> desc | undefined\n  .getOwnPropertyNames(var) -> array\n  #propertyIsEnumerable(key) -> bool\nJSON\n  .stringify(target, replacer?, space?) -> string | undefined\n```\n[Basic example](http://goo.gl/BbvWFc):\n```javascript\nvar Person = (function(){\n  var NAME = Symbol('name');\n  function Person(name){\n    this[NAME] = name;\n  }\n  Person.prototype.getName = function(){\n    return this[NAME];\n  };\n  return Person;\n})();\n\nvar person = new Person('Vasya');\nlog(person.getName());          // => 'Vasya'\nlog(person['name']);            // => undefined\nlog(person[Symbol('name')]);    // => undefined, symbols are uniq\nfor(var key in person)log(key); // => only 'getName', symbols are not enumerable\n```\n`Symbol.for` & `Symbol.keyFor` [example](http://goo.gl/0pdJjX):\n```javascript\nvar symbol = Symbol.for('key');\nsymbol === Symbol.for('key'); // true\nSymbol.keyFor(symbol);        // 'key'\n```\n[Example](http://goo.gl/mKVOQJ) with methods for getting own object keys:\n```javascript\nvar O = {a: 1};\nObject.defineProperty(O, 'b', {value: 2});\nO[Symbol('c')] = 3;\nObject.keys(O);                  // => ['a']\nObject.getOwnPropertyNames(O);   // => ['a', 'b']\nObject.getOwnPropertySymbols(O); // => [Symbol(c)]\nReflect.ownKeys(O);              // => ['a', 'b', Symbol(c)]\n```\n#### Caveats when using `Symbol` polyfill:\n\n* We can't add new primitive type, `Symbol` returns object.\n* `Symbol.for` and `Symbol.keyFor` can't be shimmed cross-realm.\n* By default, to hide the keys, `Symbol` polyfill defines setter in `Object.prototype`. For this reason, uncontrolled creation of symbols can cause memory leak and the `in` operator is not working correctly with `Symbol` polyfill: `Symbol() in {} // => true`.\n\nYou can disable defining setters in `Object.prototype`. [Example](http://goo.gl/N5UD7J):\n```javascript\nSymbol.useSimple();\nvar s1 = Symbol('s1')\n  , o1 = {};\no1[s1] = true;\nfor(var key in o1)log(key); // => 'Symbol(s1)_t.qamkg9f3q', w/o native Symbol\n\nSymbol.useSetter();\nvar s2 = Symbol('s2')\n  , o2 = {};\no2[s2] = true;\nfor(var key in o2)log(key); // nothing\n```\n* Currently, `core-js` not adds setters to `Object.prototype` for well-known symbols for correct work something like `Symbol.iterator in foo`. It can cause problems with their enumerability.\n\n#### ECMAScript 6: Collections\n`core-js` uses native collections in most case, just fixes methods / constructor, if it's required, and in old environment uses fast polyfill (O(1) lookup).\n#### Map\nModule [`es6.map`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.map.js). About iterators from this module [here](#ecmascript-6-iterators).\n```javascript\nnew Map(iterable (entries) ?) -> map\n  #clear() -> void\n  #delete(key) -> bool\n  #forEach(fn(val, key, @), that) -> void\n  #get(key) -> val\n  #has(key) -> bool\n  #set(key, val) -> @\n  #size -> uint\n```\n[Example](http://goo.gl/RDbROF):\n```javascript\nvar a = [1];\n\nvar map = new Map([['a', 1], [42, 2]]);\nmap.set(a, 3).set(true, 4);\n\nlog(map.size);        // => 4\nlog(map.has(a));      // => true\nlog(map.has([1]));    // => false\nlog(map.get(a));      // => 3\nmap.forEach(function(val, key){\n  log(val);           // => 1, 2, 3, 4\n  log(key);           // => 'a', 42, [1], true\n});\nmap.delete(a);\nlog(map.size);        // => 3\nlog(map.get(a));      // => undefined\nlog(Array.from(map)); // => [['a', 1], [42, 2], [true, 4]]\n```\n#### Set\nModule [`es6.set`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.set.js). About iterators from this module [here](#ecmascript-6-iterators).\n```javascript\nnew Set(iterable?) -> set\n  #add(key) -> @\n  #clear() -> void\n  #delete(key) -> bool\n  #forEach(fn(el, el, @), that) -> void\n  #has(key) -> bool\n  #size -> uint\n```\n[Example](http://goo.gl/7XYya3):\n```javascript\nvar set = new Set(['a', 'b', 'a', 'c']);\nset.add('d').add('b').add('e');\nlog(set.size);        // => 5\nlog(set.has('b'));    // => true\nset.forEach(function(it){\n  log(it);            // => 'a', 'b', 'c', 'd', 'e'\n});\nset.delete('b');\nlog(set.size);        // => 4\nlog(set.has('b'));    // => false\nlog(Array.from(set)); // => ['a', 'c', 'd', 'e']\n```\n#### WeakMap\nModule [`es6.weak-map`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.weak-map.js).\n```javascript\nnew WeakMap(iterable (entries) ?) -> weakmap\n  #delete(key) -> bool\n  #get(key) -> val\n  #has(key) -> bool\n  #set(key, val) -> @\n```\n[Example](http://goo.gl/SILXyw):\n```javascript\nvar a = [1]\n  , b = [2]\n  , c = [3];\n\nvar wmap = new WeakMap([[a, 1], [b, 2]]);\nwmap.set(c, 3).set(b, 4);\nlog(wmap.has(a));   // => true\nlog(wmap.has([1])); // => false\nlog(wmap.get(a));   // => 1\nwmap.delete(a);\nlog(wmap.get(a));   // => undefined\n\n// Private properties store:\nvar Person = (function(){\n  var names = new WeakMap;\n  function Person(name){\n    names.set(this, name);\n  }\n  Person.prototype.getName = function(){\n    return names.get(this);\n  };\n  return Person;\n})();\n\nvar person = new Person('Vasya');\nlog(person.getName());          // => 'Vasya'\nfor(var key in person)log(key); // => only 'getName'\n```\n#### WeakSet\nModule [`es6.weak-set`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.weak-set.js).\n```javascript\nnew WeakSet(iterable?) -> weakset\n  #add(key) -> @\n  #delete(key) -> bool\n  #has(key) -> bool\n```\n[Example](http://goo.gl/TdFbEx):\n```javascript\nvar a = [1]\n  , b = [2]\n  , c = [3];\n\nvar wset = new WeakSet([a, b, a]);\nwset.add(c).add(b).add(c);\nlog(wset.has(b));   // => true\nlog(wset.has([2])); // => false\nwset.delete(b);\nlog(wset.has(b));   // => false\n```\n#### Caveats when using collections polyfill:\n\n* Frozen objects as collection keys are supported, but not recomended - it's slow (O(n) instead of O(1)) and, for weak-collections, leak.\n* Weak-collections polyfill stores values as hidden properties of keys. It works correct and not leak in most cases. However, it is desirable to store a collection longer than its keys.\n\n#### ECMAScript 6: Iterators\nModules [`es6.string.iterator`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.string.iterator.js) and [`es6.array.iterator`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.array.iterator.js):\n```javascript\nString\n  #@@iterator() -> iterator\nArray\n  #values() -> iterator\n  #keys() -> iterator\n  #entries() -> iterator (entries)\n  #@@iterator() -> iterator\nArguments\n  #@@iterator() -> iterator (available only in core-js methods)\n```\nModules [`es6.map`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.map.js) and [`es6.set`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.set.js):\n```javascript\nMap\n  #values() -> iterator\n  #keys() -> iterator\n  #entries() -> iterator (entries)\n  #@@iterator() -> iterator (entries)\nSet\n  #values() -> iterator\n  #keys() -> iterator\n  #entries() -> iterator (entries)\n  #@@iterator() -> iterator\n```\nModule [`web.dom.iterable`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/web.dom.iterable.js):\n```javascript\nNodeList\n  #@@iterator() -> iterator\n```\n[Example](http://goo.gl/nzHVQF):\n```javascript\nvar string = 'a𠮷b';\n\nfor(var val of string)log(val);         // => 'a', '𠮷', 'b'\n\nvar array = ['a', 'b', 'c'];\n\nfor(var val of array)log(val);          // => 'a', 'b', 'c'\nfor(var val of array.values())log(val); // => 'a', 'b', 'c'\nfor(var key of array.keys())log(key);   // => 0, 1, 2\nfor(var [key, val] of array.entries()){\n  log(key);                             // => 0, 1, 2\n  log(val);                             // => 'a', 'b', 'c'\n}\n\nvar map = new Map([['a', 1], ['b', 2], ['c', 3]]);\n\nfor(var [key, val] of map){\n  log(key);                             // => 'a', 'b', 'c'\n  log(val);                             // => 1, 2, 3\n}\nfor(var val of map.values())log(val);   // => 1, 2, 3\nfor(var key of map.keys())log(key);     // => 'a', 'b', 'c'\nfor(var [key, val] of map.entries()){\n  log(key);                             // => 'a', 'b', 'c'\n  log(val);                             // => 1, 2, 3\n}\n\nvar set = new Set([1, 2, 3, 2, 1]);\n\nfor(var val of set)log(val);            // => 1, 2, 3\nfor(var val of set.values())log(val);   // => 1, 2, 3\nfor(var key of set.keys())log(key);     // => 1, 2, 3\nfor(var [key, val] of set.entries()){\n  log(key);                             // => 1, 2, 3\n  log(val);                             // => 1, 2, 3\n}\n\nfor(var x of document.querySelectorAll('*')){\n  log(x.id);\n}\n```\nModules [`core.is-iterable`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/core.is-iterable.js), [`core.get-iterator`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/core.get-iterator.js), [`core.get-iterator-method`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/core.get-iterator-method.js) - helpers for check iterable / get iterator in `library` version or, for example, for `arguments` object:\n```javascript\ncore\n  .isIterable(var) -> bool\n  .getIterator(iterable) -> iterator\n  .getIteratorMethod(var) -> function | undefined\n```\n[Example](http://goo.gl/SXsM6D):\n```js\nvar list = (function(){\n  return arguments;\n})(1, 2, 3);\n\nlog(core.isIterable(list)); // true;\n\nvar iter = core.getIterator(list);\nlog(iter.next().value); // 1\nlog(iter.next().value); // 2\nlog(iter.next().value); // 3\nlog(iter.next().value); // undefined\n\ncore.getIterator({});   // TypeError: [object Object] is not iterable!\n\nvar iterFn = core.getIteratorMethod(list);\nlog(typeof iterFn);     // 'function'\nvar iter = iterFn.call(list);\nlog(iter.next().value); // 1\nlog(iter.next().value); // 2\nlog(iter.next().value); // 3\nlog(iter.next().value); // undefined\n\nlog(core.getIteratorMethod({})); // undefined\n```\n#### ECMAScript 6: Promise\nModule [`es6.promise`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.promise.js).\n```javascript\nnew Promise(executor(resolve(var), reject(var))) -> promise\n  #then(resolved(var), rejected(var)) -> promise\n  #catch(rejected(var)) -> promise\n  .resolve(var || promise) -> promise\n  .reject(var) -> promise\n  .all(iterable) -> promise\n  .race(iterable) -> promise\n```\nBasic [example](http://goo.gl/vGrtUC):\n```javascript\nfunction sleepRandom(time){\n  return new Promise(function(resolve, reject){\n    setTimeout(resolve, time * 1e3, 0 | Math.random() * 1e3);\n  });\n}\n\nlog('Run');                    // => Run\nsleepRandom(5).then(function(result){\n  log(result);                 // => 869, after 5 sec.\n  return sleepRandom(10);\n}).then(function(result){\n  log(result);                 // => 202, after 10 sec.\n}).then(function(){\n  log('immediately after');    // => immediately after\n  throw Error('Irror!');\n}).then(function(){\n  log('will not be displayed');\n}).catch(log);                 // => => Error: Irror!\n```\n`Promise.resolve` and `Promise.reject` [example](http://goo.gl/vr8TN3):\n```javascript\nPromise.resolve(42).then(log); // => 42\nPromise.reject(42).catch(log); // => 42\n\nPromise.resolve($.getJSON('/data.json')); // => ES6 promise\n```\n`Promise.all` [example](http://goo.gl/RdoDBZ):\n```javascript\nPromise.all([\n  'foo',\n  sleepRandom(5),\n  sleepRandom(15),\n  sleepRandom(10)  // after 15 sec:\n]).then(log);      // => ['foo', 956, 85, 382]\n```\n`Promise.race` [example](http://goo.gl/L8ovkJ):\n```javascript\nfunction timeLimit(promise, time){\n  return Promise.race([promise, new Promise(function(resolve, reject){\n    setTimeout(reject, time * 1e3, Error('Await > ' + time + ' sec'));\n  })]);\n}\n\ntimeLimit(sleepRandom(5), 10).then(log);   // => 853, after 5 sec.\ntimeLimit(sleepRandom(15), 10).catch(log); // Error: Await > 10 sec\n```\nECMAScript 7 [async functions](https://tc39.github.io/ecmascript-asyncawait) [example](http://goo.gl/wnQS4j):\n```javascript\nvar delay = time => new Promise(resolve => setTimeout(resolve, time))\n\nasync function sleepRandom(time){\n  await delay(time * 1e3);\n  return 0 | Math.random() * 1e3;\n};\nasync function sleepError(time, msg){\n  await delay(time * 1e3);\n  throw Error(msg);\n};\n\n(async () => {\n  try {\n    log('Run');                // => Run\n    log(await sleepRandom(5)); // => 936, after 5 sec.\n    var [a, b, c] = await Promise.all([\n      sleepRandom(5),\n      sleepRandom(15),\n      sleepRandom(10)\n    ]);\n    log(a, b, c);              // => 210 445 71, after 15 sec.\n    await sleepError(5, 'Irror!');\n    log('Will not be displayed');\n  } catch(e){\n    log(e);                    // => Error: 'Irror!', after 5 sec.\n  }\n})();\n```\n\n##### Unhandled rejection tracking\n\n`core-js` `Promise` supports (but not adds to native implementations) unhandled rejection tracking.\n\n[Node.js](https://gist.github.com/benjamingr/0237932cee84712951a2):\n```js\nprocess.on('unhandledRejection', (reason, promise) => console.log(reason, promise));\nPromise.reject(42);\n// 42 [object Promise]\n\n```\nIn a browser, by default, you will see notify in the console, or you can add a custom handler, [example](http://goo.gl/izTr2I):\n```js\nwindow.onunhandledrejection = e => log(e.reason, e.promise);\nPromise.reject(42);\n// 42 [object Promise]\n```\n**Warning**: The problem here - we can't add it to native `Promise` implementations, but by idea `core-js` should use enough correct native implementation if it's available. Currently, most native implementations are buggy and `core-js` uses polyfill, but the situation will be changed. If someone wanna use this hook everywhere - he should delete `window.Promise` before inclusion `core-js`.\n\n\n#### ECMAScript 6: Reflect\nModules [`es6.reflect.apply`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.apply.js), [`es6.reflect.construct`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.construct.js), [`es6.reflect.define-property`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.define-property.js), [`es6.reflect.delete-property`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.delete-property.js), [`es6.reflect.enumerate`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.enumerate.js), [`es6.reflect.get`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.get.js), [`es6.reflect.get-own-property-descriptor`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.get-own-property-descriptor.js), [`es6.reflect.get-prototype-of`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.get-prototype-of.js), [`es6.reflect.has`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.has.js), [`es6.reflect.is-extensible`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.is-extensible.js), [`es6.reflect.own-keys`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.own-keys.js), [`es6.reflect.prevent-extensions`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.prevent-extensions.js), [`es6.reflect.set`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.set.js), [`es6.reflect.set-prototype-of`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es6.reflect.set-prototype-of.js).\n```javascript\nReflect\n  .apply(target, thisArgument, argumentsList) -> var\n  .construct(target, argumentsList, newTarget?) -> object\n  .defineProperty(target, propertyKey, attributes) -> bool\n  .deleteProperty(target, propertyKey) -> bool\n  .enumerate(target) -> iterator\n  .get(target, propertyKey, receiver?) -> var\n  .getOwnPropertyDescriptor(target, propertyKey) -> desc\n  .getPrototypeOf(target) -> object | null\n  .has(target, propertyKey) -> bool\n  .isExtensible(target) -> bool\n  .ownKeys(target) -> array\n  .preventExtensions(target) -> bool\n  .set(target, propertyKey, V, receiver?) -> bool\n  .setPrototypeOf(target, proto) -> bool (required __proto__ - IE11+)\n```\n[Example](http://goo.gl/gVT0cH):\n```javascript\nvar O = {a: 1};\nObject.defineProperty(O, 'b', {value: 2});\nO[Symbol('c')] = 3;\nReflect.ownKeys(O); // => ['a', 'b', Symbol(c)]\n\nfunction C(a, b){\n  this.c = a + b;\n}\n\nvar instance = Reflect.construct(C, [20, 22]);\ninstance.c; // => 42\n```\n### ECMAScript 7\n* `Array#includes` [proposal](https://github.com/domenic/Array.prototype.includes) - module [`es7.array.includes`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.array.includes.js)\n* `String#at` [proposal](https://github.com/mathiasbynens/String.prototype.at) - module [`es7.string.at`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.string.at.js)\n* `String#padLeft`, `String#padRight` [proposal](https://github.com/ljharb/proposal-string-pad-left-right) - modules [`es7.string.pad-left`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.string.pad-left.js), [`es7.string.pad-right`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.string.pad-right.js)\n* `String#trimLeft`, `String#trimRight` [proposal](https://github.com/sebmarkbage/ecmascript-string-left-right-trim) - modules [`es7.string.trim-left`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.string.trim-right.js), [`es7.string.trim-right`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.string.trim-right.js)\n* `Object.values`, `Object.entries` [proposal](https://github.com/ljharb/proposal-object-values-entries) - modules [`es7.object.values`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.object.values.js), [`es7.object.entries`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.object.entries.js)\n* `Object.getOwnPropertyDescriptors` [proposal](https://gist.github.com/WebReflection/9353781) - module [`es7.object.get-own-property-descriptors`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.object.get-own-property-descriptors.js)\n* `RegExp.escape` [proposal](https://github.com/benjamingr/RexExp.escape) - module [`es7.regexp.escape`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.regexp.escape.js)\n* `Map#toJSON`, `Set#toJSON` [proposal](https://github.com/DavidBruant/Map-Set.prototype.toJSON) - modules [`es7.map.to-json`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.map.to-json.js), [`es7.set.to-json`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/es7.set.to-json.js)\n\n```javascript\nArray\n  #includes(var, from?) -> bool\nString\n  #at(index) -> string\n  #padLeft(length, fillStr = ' ') -> string\n  #padRight(length, fillStr = ' ') -> string\n  #trimLeft() -> string\n  #trimRight() -> string\nObject\n  .values(object) -> array\n  .entries(object) -> array\n  .getOwnPropertyDescriptors(object) -> object\nRegExp\n  .escape(str) -> str\nMap\n  #toJSON() -> array\nSet\n  #toJSON() -> array\n```\n[Examples](http://goo.gl/aUZQRH):\n```javascript\n[1, 2, 3].includes(2);        // => true\n[1, 2, 3].includes(4);        // => false\n[1, 2, 3].includes(2, 2);     // => false\n\n[NaN].indexOf(NaN);           // => -1\n[NaN].includes(NaN);          // => true\nArray(1).indexOf(undefined);  // => -1\nArray(1).includes(undefined); // => true\n\n'a𠮷b'.at(1);        // => '𠮷'\n'a𠮷b'.at(1).length; // => 2\n\n'hello'.padLeft(10);          // => '     hello'\n'hello'.padLeft(10, '1234');  // => '41234hello'\n'hello'.padRight(10);         // => 'hello     '\n'hello'.padRight(10, '1234'); // => 'hello12341'\n\n'   hello   '.trimLeft();  // => 'hello   '\n'   hello   '.trimRight(); // => '   hello'\n\nObject.values({a: 1, b: 2, c: 3});  // => [1, 2, 3]\nObject.entries({a: 1, b: 2, c: 3}); // => [['a', 1], ['b', 2], ['c', 3]]\n\n// Shallow object cloning with prototype and descriptors:\nvar copy = Object.create(Object.getPrototypeOf(O), Object.getOwnPropertyDescriptors(O));\n// Mixin:\nObject.defineProperties(target, Object.getOwnPropertyDescriptors(source));\n\nRegExp.escape('Hello, []{}()*+?.\\\\^$|!'); // => 'Hello, \\[\\]\\{\\}\\(\\)\\*\\+\\?\\.\\\\\\^\\$\\|!'\n\nJSON.stringify(new Map([['a', 'b'], ['c', 'd']])); // => '[[\"a\",\"b\"],[\"c\",\"d\"]]'\nJSON.stringify(new Set([1, 2, 3, 2, 1]));          // => '[1,2,3]'\n```\n### Mozilla JavaScript: Array generics\nModule [`js.array.statics`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/js.array.statics.js).\n```javascript\nArray\n  .{...ArrayPrototype methods}\n```\n\n```javascript\nArray.slice(arguments, 1);\n\nArray.join('abcdef', '+'); // => 'a+b+c+d+e+f'\n\nvar form = document.getElementsByClassName('form__input');\nArray.reduce(form, function(memo, it){\n  memo[it.name] = it.value;\n  return memo;\n}, {}); // => {name: 'Vasya', age: '42', sex: 'yes, please'}\n```\n### Web standards\n#### setTimeout / setInterval\nModule [`web.timers`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/web.timers.js). Additional arguments fix for IE9-.\n```javascript\nsetTimeout(fn(...args), time, ...args) -> id\nsetInterval(fn(...args), time, ...args) -> id\n```\n```javascript\n// Before:\nsetTimeout(log.bind(null, 42), 1000);\n// After:\nsetTimeout(log, 1000, 42);\n```\n#### setImmediate\nModule [`web.immediate`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/web.immediate.js). [`setImmediate` proposal](https://developer.mozilla.org/en-US/docs/Web/API/Window.setImmediate) polyfill.\n```javascript\nsetImmediate(fn(...args), ...args) -> id\nclearImmediate(id) -> void\n```\n[Example](http://goo.gl/6nXGrx):\n```javascript\nsetImmediate(function(arg1, arg2){\n  log(arg1, arg2); // => Message will be displayed with minimum delay\n}, 'Message will be displayed', 'with minimum delay');\n\nclearImmediate(setImmediate(function(){\n  log('Message will not be displayed');\n}));\n```\n### Non-standard\n#### Object\nModules [`core.object.is-object`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/core.object.is-object.js), [`core.object.classof`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/core.object.classof.js), [`core.object.define`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/core.object.define.js), [`core.object.make`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/core.object.make.js).\n```javascript\nObject\n  .isObject(var) -> bool\n  .classof(var) -> string \n  .define(target, mixin) -> target\n  .make(proto | null, mixin?) -> object\n```\nObject classify [examples](http://goo.gl/YZQmGo):\n```javascript\nObject.isObject({});    // => true\nObject.isObject(isNaN); // => true\nObject.isObject(null);  // => false\n\nvar classof = Object.classof;\n\nclassof(null);                 // => 'Null'\nclassof(undefined);            // => 'Undefined'\nclassof(1);                    // => 'Number'\nclassof(true);                 // => 'Boolean'\nclassof('string');             // => 'String'\nclassof(Symbol());             // => 'Symbol'\n\nclassof(new Number(1));        // => 'Number'\nclassof(new Boolean(true));    // => 'Boolean'\nclassof(new String('string')); // => 'String'\n\nvar fn   = function(){}\n  , list = (function(){return arguments})(1, 2, 3);\n\nclassof({});                   // => 'Object'\nclassof(fn);                   // => 'Function'\nclassof([]);                   // => 'Array'\nclassof(list);                 // => 'Arguments'\nclassof(/./);                  // => 'RegExp'\nclassof(new TypeError);        // => 'Error'\n\nclassof(new Set);              // => 'Set'\nclassof(new Map);              // => 'Map'\nclassof(new WeakSet);          // => 'WeakSet'\nclassof(new WeakMap);          // => 'WeakMap'\nclassof(new Promise(fn));      // => 'Promise'\n\nclassof([].values());          // => 'Array Iterator'\nclassof(new Set().values());   // => 'Set Iterator'\nclassof(new Map().values());   // => 'Map Iterator'\n\nclassof(Math);                 // => 'Math'\nclassof(JSON);                 // => 'JSON'\n\nfunction Example(){}\nExample.prototype[Symbol.toStringTag] = 'Example';\n\nclassof(new Example);          // => 'Example'\n```\n`Object.define` and `Object.make` [examples](http://goo.gl/rtpD5Z):\n```javascript\n// Before:\nObject.defineProperty(target, 'c', {\n  enumerable: true,\n  configurable: true,\n  get: function(){\n    return this.a + this.b;\n  }\n});\n\n// After:\nObject.define(target, {\n  get c(){\n    return this.a + this.b;\n  }\n});\n\n// Shallow object cloning with prototype and descriptors:\nvar copy = Object.make(Object.getPrototypeOf(src), src);\n\n// Simple inheritance:\nfunction Vector2D(x, y){\n  this.x = x;\n  this.y = y;\n}\nObject.define(Vector2D.prototype, {\n  get xy(){\n    return Math.hypot(this.x, this.y);\n  }\n});\nfunction Vector3D(x, y, z){\n  Vector2D.apply(this, arguments);\n  this.z = z;\n}\nVector3D.prototype = Object.make(Vector2D.prototype, {\n  constructor: Vector3D,\n  get xyz(){\n    return Math.hypot(this.x, this.y, this.z);\n  }\n});\n\nvar vector = new Vector3D(9, 12, 20);\nlog(vector.xy);  // => 15\nlog(vector.xyz); // => 25\nvector.y++;\nlog(vector.xy);  // => 15.811388300841896\nlog(vector.xyz); // => 25.495097567963924\n```\n#### Dict\nModule [`core.dict`](https://github.com/zloirock/core-js/blob/v1.2.6/modules/core.dict.js). Based on [TC39 discuss](https://github.com/rwaldron/tc39-notes/blob/master/es6/2012-11/nov-29.md#collection-apis-review) / [strawman](http://wiki.ecmascript.org/doku.php?id=harmony:modules_standard#dictionaries).\n```javascript\n[new] Dict(iterable (entries) | object ?) -> dict\n  .isDict(var) -> bool\n  .values(object) -> iterator\n  .keys(object) -> iterator\n  .entries(object) -> iterator (entries)\n  .has(object, key) -> bool\n  .get(object, key) -> val\n  .set(object, key, value) -> object\n  .forEach(object, fn(val, key, @), that) -> void\n  .map(object, fn(val, key, @), that) -> new @\n  .mapPairs(object, fn(val, key, @), that) -> new @\n  .filter(object, fn(val, key, @), that) -> new @\n  .some(object, fn(val, key, @), that) -> bool\n  .every(object, fn(val, key, @), that) -> bool\n  .find(object, fn(val, key, @), that) -> val\n  .findKey(object, fn(val, key, @), that) -> key\n  .keyOf(object, var) -> key\n  .includes(object, var) -> bool\n  .reduce(object, fn(memo, val, key, @), memo?) -> var\n```\n`Dict` create object without prototype from iterable or simple object. [Example](http://goo.gl/pnp8Vr):\n```javascript\nvar map = new Map([['a', 1], ['b', 2], ['c', 3]]);\n\nDict();                    // => {__proto__: null}\nDict({a: 1, b: 2, c: 3});  // => {__proto__: null, a: 1, b: 2, c: 3}\nDict(map);                 // => {__proto__: null, a: 1, b: 2, c: 3}\nDict([1, 2, 3].entries()); // => {__proto__: null, 0: 1, 1: 2, 2: 3}\n\nvar dict = Dict({a: 42});\ndict instanceof Object;   // => false\ndict.a;                   // => 42\ndict.toString;