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    core-js-bundle

    3.23.3 • Public • Published

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    Open Collective version core-js downloads core-js-pure downloads tests eslint

    Modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2021: 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.

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

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    Example of usage:

    import 'core-js/actual'; // <- at the top of your entry point
    
    Array.from(new Set([1, 2, 3, 2, 1]));          // => [1, 2, 3]
    [1, 2, 3, 4, 5].group(it => it % 2);           // => { 1: [1, 3, 5], 0: [2, 4] }
    Promise.resolve(42).then(x => console.log(x)); // => 42
    structuredClone(new Set([1, 2, 3]));           // => new Set([1, 2, 3])
    queueMicrotask(() => console.log('called as microtask'));

    You can load only required features:

    import 'core-js/actual/array/from';       // <- at the top of your entry point
    import 'core-js/actual/array/group';      // <- at the top of your entry point
    import 'core-js/actual/set';              // <- at the top of your entry point
    import 'core-js/actual/promise';          // <- at the top of your entry point
    import 'core-js/actual/structured-clone'; // <- at the top of your entry point
    import 'core-js/actual/queue-microtask';  // <- at the top of your entry point
    
    Array.from(new Set([1, 2, 3, 2, 1]));          // => [1, 2, 3]
    [1, 2, 3, 4, 5].group(it => it % 2);           // => { 1: [1, 3, 5], 0: [2, 4] }
    Promise.resolve(42).then(x => console.log(x)); // => 42
    structuredClone(new Set([1, 2, 3]));           // => new Set([1, 2, 3])
    queueMicrotask(() => console.log('called as microtask'));

    Or use it without global namespace pollution:

    import from from 'core-js-pure/actual/array/from';
    import group from 'core-js-pure/actual/array/group';
    import Set from 'core-js-pure/actual/set';
    import Promise from 'core-js-pure/actual/promise';
    import structuredClone from 'core-js-pure/actual/structured-clone';
    import queueMicrotask from 'core-js-pure/actual/queue-microtask';
    
    from(new Set([1, 2, 3, 2, 1]));                // => [1, 2, 3]
    group([1, 2, 3, 4, 5], it => it % 2);          // => { 1: [1, 3, 5], 0: [2, 4] }
    Promise.resolve(42).then(x => console.log(x)); // => 42
    structuredClone(new Set([1, 2, 3]));           // => new Set([1, 2, 3])
    queueMicrotask(() => console.log('called as microtask'));

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

    Install

    npm i core-js-bundle

    DownloadsWeekly Downloads

    52,842

    Version

    3.23.3

    License

    MIT

    Unpacked Size

    1.28 MB

    Total Files

    7

    Last publish

    Collaborators

    • zloirock