# core-js
[![Sponsors on Open Collective](https://opencollective.com/core-js/sponsors/badge.svg)](#raising-funds) [![Backers on Open Collective](https://opencollective.com/core-js/backers/badge.svg)](#raising-funds) [![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) [![Build Status](https://travis-ci.org/zloirock/core-js.svg)](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?type=dev)
## As advertising: the author is looking for a good job :)
## [core-js@3, babel and a look into the future](https://github.com/zloirock/core-js/tree/master/docs/2019-03-19-core-js-3-babel-and-a-look-into-the-future.md)
## Raising funds
`core-js` isn't backed by a company, so the future of this project depends on you. Become a sponsor or a backer [**on Open Collective**](https://opencollective.com/core-js) or [**on Patreon**](https://www.patreon.com/zloirock) if you are interested in `core-js`.
---
<a href="https://opencollective.com/core-js/sponsor/0/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/0/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/1/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/1/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/2/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/2/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/3/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/3/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/4/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/4/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/5/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/5/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/6/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/6/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/7/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/7/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/8/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/8/avatar.svg"></a><a href="https://opencollective.com/core-js/sponsor/9/website" target="_blank"><img src="https://opencollective.com/core-js/sponsor/9/avatar.svg"></a>
---
<a href="https://opencollective.com/core-js#backers" target="_blank"><img src="https://opencollective.com/core-js/backers.svg?width=890"></a>
---
**It's documentation for obsolete `core-js@2`. If you looking documentation for actual `core-js` version, please, check [this branch](https://github.com/zloirock/core-js/tree/master).**
Modular standard library for JavaScript. Includes polyfills for [ECMAScript 5](#ecmascript-5), [ECMAScript 6](#ecmascript-6): [promises](#ecmascript-6-promise), [symbols](#ecmascript-6-symbol), [collections](#ecmascript-6-collections), iterators, [typed arrays](#ecmascript-6-typed-arrays), [ECMAScript 7+ proposals](#ecmascript-7-proposals), [setImmediate](#setimmediate), etc. Some additional features such as [dictionaries](#dict) or [extended partial application](#partial-application). You can require only needed features or use it without global namespace pollution.
[*Example*](http://goo.gl/a2xexl):
```js
Array.from(new Set([1, 2, 3, 2, 1])); // => [1, 2, 3]
'*'.repeat(10); // => '**********'
Promise.resolve(32).then(x => console.log(x)); // => 32
setImmediate(x => console.log(x), 42); // => 42
```
[*Without global namespace pollution*](http://goo.gl/paOHb0):
```js
var core = require('core-js/library'); // With a modular system, otherwise use global `core`
core.Array.from(new core.Set([1, 2, 3, 2, 1])); // => [1, 2, 3]
core.String.repeat('*', 10); // => '**********'
core.Promise.resolve(32).then(x => console.log(x)); // => 32
core.setImmediate(x => console.log(x), 42); // => 42
```
### Index
- [Usage](#usage)
- [Basic](#basic)
- [CommonJS](#commonjs)
- [Custom build](#custom-build-from-the-command-line)
- [Supported engines](#supported-engines)
- [Features](#features)
- [ECMAScript 5](#ecmascript-5)
- [ECMAScript 6](#ecmascript-6)
- [ECMAScript 6: Object](#ecmascript-6-object)
- [ECMAScript 6: Function](#ecmascript-6-function)
- [ECMAScript 6: Array](#ecmascript-6-array)
- [ECMAScript 6: String](#ecmascript-6-string)
- [ECMAScript 6: RegExp](#ecmascript-6-regexp)
- [ECMAScript 6: Number](#ecmascript-6-number)
- [ECMAScript 6: Math](#ecmascript-6-math)
- [ECMAScript 6: Date](#ecmascript-6-date)
- [ECMAScript 6: Promise](#ecmascript-6-promise)
- [ECMAScript 6: Symbol](#ecmascript-6-symbol)
- [ECMAScript 6: Collections](#ecmascript-6-collections)
- [ECMAScript 6: Typed Arrays](#ecmascript-6-typed-arrays)
- [ECMAScript 6: Reflect](#ecmascript-6-reflect)
- [ECMAScript 7+ proposals](#ecmascript-7-proposals)
- [stage 4 proposals](#stage-4-proposals)
- [stage 3 proposals](#stage-3-proposals)
- [stage 2 proposals](#stage-2-proposals)
- [stage 1 proposals](#stage-1-proposals)
- [stage 0 proposals](#stage-0-proposals)
- [pre-stage 0 proposals](#pre-stage-0-proposals)
- [Web standards](#web-standards)
- [setTimeout / setInterval](#settimeout--setinterval)
- [setImmediate](#setimmediate)
- [iterable DOM collections](#iterable-dom-collections)
- [Non-standard](#non-standard)
- [Object](#object)
- [Dict](#dict)
- [partial application](#partial-application)
- [Number Iterator](#number-iterator)
- [escaping strings](#escaping-strings)
- [delay](#delay)
- [helpers for iterators](#helpers-for-iterators)
- [Missing polyfills](#missing-polyfills)
- [Changelog](./CHANGELOG.md)
## Usage
### Basic
```
npm i core-js
bower install core.js
```
```js
// Default
require('core-js');
// Without global namespace pollution
var core = require('core-js/library');
// Shim only
require('core-js/shim');
```
If you need complete build for browser, use builds from `core-js/client` path:
* [default](https://raw.githack.com/zloirock/core-js/v2.6.12/client/core.min.js): Includes all features, standard and non-standard.
* [as a library](https://raw.githack.com/zloirock/core-js/v2.6.12/client/library.min.js): Like "default", but does not pollute the global namespace (see [2nd example at the top](#core-js)).
* [shim only](https://raw.githack.com/zloirock/core-js/v2.6.12/client/shim.min.js): Only includes the standard methods.
Warning: if you use `core-js` with the extension of native objects, require all needed `core-js` modules at the beginning of entry point of your application, otherwise, conflicts may occur.
### CommonJS
You can require only needed modules.
```js
require('core-js/fn/set');
require('core-js/fn/array/from');
require('core-js/fn/array/find-index');
Array.from(new Set([1, 2, 3, 2, 1])); // => [1, 2, 3]
[1, 2, NaN, 3, 4].findIndex(isNaN); // => 2
// or, w/o global namespace pollution:
var Set = require('core-js/library/fn/set');
var from = require('core-js/library/fn/array/from');
var findIndex = require('core-js/library/fn/array/find-index');
from(new Set([1, 2, 3, 2, 1])); // => [1, 2, 3]
findIndex([1, 2, NaN, 3, 4], isNaN); // => 2
```
Available entry points for methods / constructors, as above examples, and namespaces: for example, `core-js/es6/array` (`core-js/library/es6/array`) contains all [ES6 `Arra
没有合适的资源?快使用搜索试试~ 我知道了~
资源推荐
资源详情
资源评论
收起资源包目录
基于Three.JS的孔明灯效果 (15909个子文件)
sshpk-conv.1 4KB
jsesc.1 3KB
jsesc.1 3KB
sshpk-sign.1 2KB
sshpk-verify.1 2KB
cssesc.1 2KB
acorn 313B
acorn 313B
acorn 298B
acorn 298B
acorn 298B
acorn 62B
acorn 62B
acorn 60B
ansi-to-html 326B
ansi-to-html 60B
atob 315B
atob 300B
AUTHORS 217B
AUTHORS 169B
.babelrc 181B
.babelrc 174B
.babelrc 165B
.babelrc 164B
.babelrc 145B
.babelrc 145B
.babelrc 139B
.babelrc 139B
.babelrc 139B
.babelrc 139B
.babelrc 68B
.babelrc 67B
README.md.bak 7KB
tr.beep 129B
flyLight.blend 829KB
flyLight.blend 820KB
flyLight.blend1 806KB
range.bnf 619B
range.bnf 619B
range.bnf 619B
brfs 313B
brfs 298B
browserslist 327B
browserslist 321B
browserslist 321B
browserslist 321B
browserslist 321B
browserslist 321B
browserslist 321B
browserslist 321B
browserslist 321B
browserslist 306B
browserslist-lint 326B
LICENSE.BSD 1KB
LICENSE.BSD 1KB
LICENSE.BSD 1KB
LICENSE.BSD 1KB
LICENSE.BSD 1KB
LICENSE.BSD 1KB
LICENSE.BSD 1KB
nothing.c 0B
.c8rc 58B
node_api.cc 119KB
node_internals.cc 4KB
deasync.cc 515B
ChangeLog 10KB
ChangeLog 8KB
three.cjs 1.08MB
cjs-proxy.cjs 632B
exit.cjs 249B
import.cjs 122B
index.cjs 111B
parser.cmd 338B
ansi-to-html.cmd 334B
miller-rabin.cmd 334B
browserslist-lint.cmd 334B
findup.cmd 333B
esgenerate.cmd 332B
esgenerate.cmd 332B
escodegen.cmd 331B
escodegen.cmd 331B
esvalidate.cmd 330B
parcel.cmd 330B
esvalidate.cmd 330B
quote-stream.cmd 328B
esparse.cmd 327B
sshpk-verify.cmd 327B
regjsparser.cmd 327B
js-yaml.cmd 327B
esparse.cmd 327B
purgecss.cmd 326B
sshpk-conv.cmd 325B
semver.cmd 325B
sshpk-sign.cmd 325B
envinfo.cmd 324B
browserslist.cmd 324B
resolve.cmd 324B
terser.cmd 324B
cssesc.cmd 322B
mkdirp.cmd 322B
共 15909 条
- 1
- 2
- 3
- 4
- 5
- 6
- 160
资源评论
长不大的小不
- 粉丝: 20
- 资源: 7
上传资源 快速赚钱
- 我的内容管理 展开
- 我的资源 快来上传第一个资源
- 我的收益 登录查看自己的收益
- 我的积分 登录查看自己的积分
- 我的C币 登录后查看C币余额
- 我的收藏
- 我的下载
- 下载帮助
安全验证
文档复制为VIP权益,开通VIP直接复制
信息提交成功