core-js-bundle

core-js-bundle

Modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2019: 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.

As advertising: the author is looking for a good job -)

core-js@3, babel and a look into the future

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 or on Patreon if you are interested in core-js.

---

---

---

Example:

import 'core-js'; // <- at the top of your entry point

Array.from(new Set([1, 2, 3, 2, 1]));          // => [1, 2, 3]
[1, [2, 3], [4, [5]]].flat(2);                 // => [1, 2, 3, 4, 5]
Promise.resolve(32).then(x => console.log(x)); // => 32

You can load only required features:

import 'core-js/features/array/from'; // <- at the top of your entry point
import 'core-js/features/array/flat'; // <- at the top of your entry point
import 'core-js/features/set';        // <- at the top of your entry point
import 'core-js/features/promise';    // <- at the top of your entry point

Array.from(new Set([1, 2, 3, 2, 1]));          // => [1, 2, 3]
[1, [2, 3], [4, [5]]].flat(2);                 // => [1, 2, 3, 4, 5]
Promise.resolve(32).then(x => console.log(x)); // => 32

Or use it without global namespace pollution:

import from from 'core-js-pure/features/array/from';
import flat from 'core-js-pure/features/array/flat';
import Set from 'core-js-pure/features/set';
import Promise from 'core-js-pure/features/promise';

from(new Set([1, 2, 3, 2, 1]));                // => [1, 2, 3]
flat([1, [2, 3], [4, [5]]], 2);                // => [1, 2, 3, 4, 5]
Promise.resolve(32).then(x => console.log(x)); // => 32

It's a bundled global version, for more info see core-js documentation.

Changelog

3.2.0 - 2019.08.09

• Promise.allSettled moved to stable ES, per July TC39 meeting
• Promise.any moved to stage 2, .errors property of AggregateError instances made non-enumerable, per July TC39 meeting
• using statement proposal moved to stage 2, added Symbol.asyncDispose, per July TC39 meeting
• Added Array.isTemplateObject stage 2 proposal, per June TC39 meeting
• Added Map#updateOrInsert stage 1 proposal, per July TC39 meeting
• Added a fix for Math.hypot V8 7.7 bug, since it's still not stable without adding results to core-js-compat
• Added a workaround for APIs where not possible to replace broken native Promise, #579 - added .finally and patched .then to / on native Promise prototype
• Fixed crashing of Opera Presto, #595
• Fixed incorrect early breaking of { Map, Set, WeakMap, WeakSet }.deleteAll
• Fixed some missed dependencies in entry points
• Added compat data for Node 12.5, FF 67, Safari 13
• Added support of DISABLE_OPENCOLLECTIVE env variable to postinstall script
• Removed core-js-pure dependency from core-js-compat, #590
• Fixed generation of core-js-compat on Windows, #606