15270821319 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
..
actual 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
es 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
features 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
full 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
internals 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
modules 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
proposals 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
stable 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
stage 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
web 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
LICENSE 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
README.md 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
configurator.js 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
index.js 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
package.json 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش
postinstall.js 4e5c5d37f9 初步设计数据库,注册登录 10 ماه پیش

README.md

logo

[![fundraising](https://opencollective.com/core-js/all/badge.svg?label=fundraising)](https://opencollective.com/core-js) [![PRs welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [![version](https://img.shields.io/npm/v/core-js-pure.svg)](https://www.npmjs.com/package/core-js-pure) [![core-js-pure downloads](https://img.shields.io/npm/dm/core-js-pure.svg?label=npm%20i%20core-js-pure)](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)

I highly recommend reading this: So, what's next?

Modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2023: promises, symbols, collections, iterators, typed arrays, many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like URL. You can load only required features or use it without global namespace pollution.

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 if you are interested in core-js: Open Collective, Patreon, Boosty, Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz ), Alipay.




Example of usage:

import 'core-js/actual';

Promise.resolve(42).then(it => console.log(it)); // => 42

Array.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]

[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]

(function * (i) { while (true) yield i++; })(1)
  .drop(1).take(5)
  .filter(it => it % 2)
  .map(it => it ** 2)
  .toArray(); // => [9, 25]

structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])

You can load only required features:

import 'core-js/actual/promise';
import 'core-js/actual/set';
import 'core-js/actual/iterator';
import 'core-js/actual/array/from';
import 'core-js/actual/array/flat-map';
import 'core-js/actual/structured-clone';

Promise.resolve(42).then(it => console.log(it)); // => 42

Array.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]

[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]

(function * (i) { while (true) yield i++; })(1)
  .drop(1).take(5)
  .filter(it => it % 2)
  .map(it => it ** 2)
  .toArray(); // => [9, 25]

structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])

Or use it without global namespace pollution:

import Promise from 'core-js-pure/actual/promise';
import Set from 'core-js-pure/actual/set';
import Iterator from 'core-js-pure/actual/iterator';
import from from 'core-js-pure/actual/array/from';
import flatMap from 'core-js-pure/actual/array/flat-map';
import structuredClone from 'core-js-pure/actual/structured-clone';

Promise.resolve(42).then(it => console.log(it)); // => 42

from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]

flatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]

Iterator.from(function * (i) { while (true) yield i++; }(1))
  .drop(1).take(5)
  .filter(it => it % 2)
  .map(it => it ** 2)
  .toArray(); // => [9, 25]

structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])

It's a version without global namespace pollution (the third example), for more info see core-js documentation.