\n```\n\nIf you wanna help to improve this data, you could take a look at the related section of [`CONTRIBUTING.md`](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md#how-to-update-core-js-compat-data). The visualization of compatibility data and the browser tests runner is available [here](http://zloirock.github.io/core-js/master/compat/), the example:\n\n\n","packages/core-js-pure/README.md":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-pure) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n![](\"https://opencollective.com/core-js/sponsor/0/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/1/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/2/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/3/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/4/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/5/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/6/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/7/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/8/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/9/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/10/avatar.svg\")
![](\"https://opencollective.com/core-js/sponsor/11/avatar.svg\")
\n\n---\n\n![](\"https://opencollective.com/core-js/backers.svg?width=890\")
\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a version without global namespace pollution (the third example), for more info see [`core-js` documentation](https://core-js.io)**.\n","packages/core-js/README.md":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a global version (first 2 examples), for more info see [`core-js` documentation](https://core-js.io).**\n","packages/core-js/actual/README.md":"This folder contains entry points for all `core-js` features with dependencies. It's the recommended way for usage only required features.\n","packages/core-js/es/README.md":"This folder contains entry points for [stable ECMAScript features](https://github.com/zloirock/core-js/#ecmascript) with dependencies.\n","packages/core-js/full/README.md":"This folder contains entry points for all `core-js` features with dependencies. It's the recommended way for usage only required features.\n","packages/core-js/internals/README.md":"This folder contains internal parts of `core-js` like helpers.\n","packages/core-js/modules/README.md":"This folder contains implementations of polyfills. It's not recommended to include in your projects directly if you don't completely understand what are you doing.\n","packages/core-js/stable/README.md":"This folder contains entry points for all stable `core-js` features with dependencies. It's the recommended way for usage only required features.\n","packages/core-js/stage/README.md":"This folder contains entry points for [ECMAScript proposals](https://github.com/zloirock/core-js#ecmascript-proposals) with dependencies.\n","packages/core-js/web/README.md":"This folder contains entry points for features from [WHATWG / W3C](https://github.com/zloirock/core-js#web-standards) with dependencies.\n"},"files":{"packages/core-js-builder/README.md":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-builder)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\nFor some cases could be useful to exclude some [`core-js`](https://core-js.io) features or generate a polyfill for target engines. This API helps conditionally include or exclude certain parts of [`core-js`](https://core-js.io) and build for targets. `modules`, `exclude` and `targets` options are specified in [the `core-js-compat` format](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat).\n\n```js\nimport builder from 'core-js-builder';\n\nconst bundle = await builder({\n // entry / module / namespace / an array of them, by default - all `core-js` modules\n modules: ['core-js/actual', /^esnext\\.reflect\\./],\n // a blacklist of entries / modules / namespaces, by default - empty list\n exclude: [/^es\\.math\\./, 'es.number.constructor'],\n // optional browserslist or core-js-compat format query\n targets: '> 0.5%, not dead, ie 9-11',\n // shows summary for the bundle, disabled by default\n summary: {\n // in the console, you could specify required parts or set `true` for enable all of them\n console: { size: true, modules: false },\n // in the comment in the target file, similarly to `summary.console`\n comment: { size: false, modules: true },\n },\n // output format, 'bundle' by default, can be 'cjs' or 'esm', and in this case\n // the result will not be bundled and will contain imports of required modules\n format: 'bundle',\n // optional target filename, if it's missed a file will not be created\n filename: PATH_TO_MY_COREJS_BUNDLE,\n});\n```\n\nℹ️ When using TypeScript, make sure to set `esModuleInterop` to `true`.\n","packages/core-js-bundle/README.md":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-bundle)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a bundled global version, for more info see [`core-js` documentation](https://core-js.io).**\n","packages/core-js-compat/README.md":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-compat) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n[`core-js-compat` package](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat) contains data about the necessity of [`core-js`](https://core-js.io) modules and API for getting a list of required core-js modules by browserslist query.\n\n```js\nimport compat from 'core-js-compat';\n\nconst {\n list, // array of required modules\n targets, // object with targets for each module\n} = compat({\n targets: '> 1%', // browserslist query or object of minimum environment versions to support, see below\n modules: [ // optional list / filter of modules - regex, string or an array of them:\n 'core-js/actual', // - an entry point\n 'esnext.array.unique-by', // - a module name (or just a start of a module name)\n /^web\\./, // - regex that a module name must satisfy\n ],\n exclude: [ // optional list / filter of modules to exclude, the signature is similar to `modules` option\n 'web.atob',\n ],\n version: '3.51', // used `core-js` version, by default - the latest\n inverse: false, // inverse of the result - shows modules that are NOT required for the target environment\n});\n\nconsole.log(targets);\n/* =>\n{\n 'es.error.cause': { ios: '14.5-14.8' },\n 'es.aggregate-error.cause': { ios: '14.5-14.8' },\n 'es.array.at': { ios: '14.5-14.8' },\n 'es.array.find-last': { firefox: '100', ios: '14.5-14.8' },\n 'es.array.find-last-index': { firefox: '100', ios: '14.5-14.8' },\n 'es.array.includes': { firefox: '100' },\n 'es.array.push': { chrome: '100', edge: '101', ios: '14.5-14.8', safari: '15.4' },\n 'es.array.unshift': { ios: '14.5-14.8', safari: '15.4' },\n 'es.object.has-own': { ios: '14.5-14.8' },\n 'es.regexp.flags': { chrome: '100', edge: '101' },\n 'es.string.at-alternative': { ios: '14.5-14.8' },\n 'es.typed-array.at': { ios: '14.5-14.8' },\n 'es.typed-array.find-last': { firefox: '100', ios: '14.5-14.8' },\n 'es.typed-array.find-last-index': { firefox: '100', ios: '14.5-14.8' },\n 'esnext.array.group': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-by': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-by-to-map': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-to-map': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-reversed': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-sorted': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-spliced': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.unique-by': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.with': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-reversed': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-sorted': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-spliced': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.with': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'web.dom-exception.stack': { chrome: '100', edge: '101', ios: '14.5-14.8', safari: '15.4' },\n 'web.immediate': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'web.structured-clone': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' }\n}\n*/\n```\n\n### `targets` option\n`targets` could be [a `browserslist` query](https://github.com/browserslist/browserslist) or a targets object that specifies minimum environment versions to support:\n```js\n// browserslist query:\n'defaults, not IE 11, maintained node versions';\n// object (sure, all those fields optional):\n({\n android: '4.0', // Android WebView version\n bun: '0.1.2', // Bun version\n chrome: '38', // Chrome version\n 'chrome-android': '18', // Chrome for Android version\n deno: '1.12', // Deno version\n edge: '13', // Edge version\n electron: '5.0', // Electron framework version\n firefox: '15', // Firefox version\n 'firefox-android': '4', // Firefox for Android version\n hermes: '0.11', // Hermes version\n ie: '8', // Internet Explorer version\n ios: '13.0', // iOS Safari version\n node: 'current', // NodeJS version, you can use 'current' for set it to currently used\n opera: '12', // Opera version\n 'opera-android': '7', // Opera for Android version\n phantom: '1.9', // PhantomJS headless browser version\n quest: '5.0', // Meta Quest Browser version\n 'react-native': '0.70', // React Native version (default Hermes engine)\n rhino: '1.7.13', // Rhino engine version\n safari: '14.0', // Safari version\n samsung: '14.0', // Samsung Internet version\n /**\n * true option set target to minimum supporting ES Modules versions of all browsers, ignoring `browsers` target.\n * 'intersect' option intersects the `browsers` target and `browserslist`'s targets. The maximum version will be used.\n */\n esmodules: true | 'intersect',\n browsers: '> 0.25%', // Browserslist query or object with target browsers\n});\n```\n\n### Additional API:\n\n```js\n// equals of of the method from the example above\nrequire('core-js-compat/compat')({ targets, modules, version }); // => { list: Array, targets: { [ModuleName]: { [EngineName]: EngineVersion } } }\n// or\nrequire('core-js-compat').compat({ targets, modules, version }); // => { list: Array, targets: { [ModuleName]: { [EngineName]: EngineVersion } } }\n\n// full compat data:\nrequire('core-js-compat/data'); // => { [ModuleName]: { [EngineName]: EngineVersion } }\n// or\nrequire('core-js-compat').data; // => { [ModuleName]: { [EngineName]: EngineVersion } }\n\n// map of modules by `core-js` entry points:\nrequire('core-js-compat/entries'); // => { [EntryPoint]: Array }\n// or\nrequire('core-js-compat').entries; // => { [EntryPoint]: Array }\n\n// full list of modules:\nrequire('core-js-compat/modules'); // => Array\n// or\nrequire('core-js-compat').modules; // => Array\n\n// the subset of modules which available in the passed `core-js` version:\nrequire('core-js-compat/get-modules-list-for-target-version')('3.51'); // => Array\n// or\nrequire('core-js-compat').getModulesListForTargetVersion('3.51'); // => Array\n```\n\nIf you wanna help to improve this data, you could take a look at the related section of [`CONTRIBUTING.md`](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md#how-to-update-core-js-compat-data). The visualization of compatibility data and the browser tests runner is available [here](http://zloirock.github.io/core-js/master/compat/), the example:\n\n\n","packages/core-js-pure/README.md":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-pure) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a version without global namespace pollution (the third example), for more info see [`core-js` documentation](https://core-js.io)**.\n","packages/core-js/README.md":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a global version (first 2 examples), for more info see [`core-js` documentation](https://core-js.io).**\n","packages/core-js/actual/README.md":"This folder contains entry points for all `core-js` features with dependencies. It's the recommended way for usage only required features.\n","packages/core-js/es/README.md":"This folder contains entry points for [stable ECMAScript features](https://github.com/zloirock/core-js/#ecmascript) with dependencies.\n","packages/core-js/full/README.md":"This folder contains entry points for all `core-js` features with dependencies. It's the recommended way for usage only required features.\n","packages/core-js/internals/README.md":"This folder contains internal parts of `core-js` like helpers.\n","packages/core-js/modules/README.md":"This folder contains implementations of polyfills. It's not recommended to include in your projects directly if you don't completely understand what are you doing.\n","packages/core-js/stable/README.md":"This folder contains entry points for all stable `core-js` features with dependencies. It's the recommended way for usage only required features.\n","packages/core-js/stage/README.md":"This folder contains entry points for [ECMAScript proposals](https://github.com/zloirock/core-js#ecmascript-proposals) with dependencies.\n","packages/core-js/web/README.md":"This folder contains entry points for features from [WHATWG / W3C](https://github.com/zloirock/core-js#web-standards) with dependencies.\n"},"items":[{"name":"README.md","path":"packages/core-js-builder/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js-builder/README.md","title":"core-js-builder Documentation","category":"plugin-manifest","format":"markdown","content":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-builder)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\nFor some cases could be useful to exclude some [`core-js`](https://core-js.io) features or generate a polyfill for target engines. This API helps conditionally include or exclude certain parts of [`core-js`](https://core-js.io) and build for targets. `modules`, `exclude` and `targets` options are specified in [the `core-js-compat` format](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat).\n\n```js\nimport builder from 'core-js-builder';\n\nconst bundle = await builder({\n // entry / module / namespace / an array of them, by default - all `core-js` modules\n modules: ['core-js/actual', /^esnext\\.reflect\\./],\n // a blacklist of entries / modules / namespaces, by default - empty list\n exclude: [/^es\\.math\\./, 'es.number.constructor'],\n // optional browserslist or core-js-compat format query\n targets: '> 0.5%, not dead, ie 9-11',\n // shows summary for the bundle, disabled by default\n summary: {\n // in the console, you could specify required parts or set `true` for enable all of them\n console: { size: true, modules: false },\n // in the comment in the target file, similarly to `summary.console`\n comment: { size: false, modules: true },\n },\n // output format, 'bundle' by default, can be 'cjs' or 'esm', and in this case\n // the result will not be bundled and will contain imports of required modules\n format: 'bundle',\n // optional target filename, if it's missed a file will not be created\n filename: PATH_TO_MY_COREJS_BUNDLE,\n});\n```\n\nℹ️ When using TypeScript, make sure to set `esModuleInterop` to `true`.\n","isInternal":false,"tokens":600,"sizeBytes":2223},{"name":"README.md","path":"packages/core-js-bundle/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js-bundle/README.md","title":"core-js-bundle Documentation","category":"plugin-manifest","format":"markdown","content":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-bundle)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a bundled global version, for more info see [`core-js` documentation](https://core-js.io).**\n","isInternal":false,"tokens":1882,"sizeBytes":5938},{"name":"README.md","path":"packages/core-js-compat/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js-compat/README.md","title":"core-js-compat Documentation","category":"plugin-manifest","format":"markdown","content":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-compat) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n[`core-js-compat` package](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat) contains data about the necessity of [`core-js`](https://core-js.io) modules and API for getting a list of required core-js modules by browserslist query.\n\n```js\nimport compat from 'core-js-compat';\n\nconst {\n list, // array of required modules\n targets, // object with targets for each module\n} = compat({\n targets: '> 1%', // browserslist query or object of minimum environment versions to support, see below\n modules: [ // optional list / filter of modules - regex, string or an array of them:\n 'core-js/actual', // - an entry point\n 'esnext.array.unique-by', // - a module name (or just a start of a module name)\n /^web\\./, // - regex that a module name must satisfy\n ],\n exclude: [ // optional list / filter of modules to exclude, the signature is similar to `modules` option\n 'web.atob',\n ],\n version: '3.51', // used `core-js` version, by default - the latest\n inverse: false, // inverse of the result - shows modules that are NOT required for the target environment\n});\n\nconsole.log(targets);\n/* =>\n{\n 'es.error.cause': { ios: '14.5-14.8' },\n 'es.aggregate-error.cause': { ios: '14.5-14.8' },\n 'es.array.at': { ios: '14.5-14.8' },\n 'es.array.find-last': { firefox: '100', ios: '14.5-14.8' },\n 'es.array.find-last-index': { firefox: '100', ios: '14.5-14.8' },\n 'es.array.includes': { firefox: '100' },\n 'es.array.push': { chrome: '100', edge: '101', ios: '14.5-14.8', safari: '15.4' },\n 'es.array.unshift': { ios: '14.5-14.8', safari: '15.4' },\n 'es.object.has-own': { ios: '14.5-14.8' },\n 'es.regexp.flags': { chrome: '100', edge: '101' },\n 'es.string.at-alternative': { ios: '14.5-14.8' },\n 'es.typed-array.at': { ios: '14.5-14.8' },\n 'es.typed-array.find-last': { firefox: '100', ios: '14.5-14.8' },\n 'es.typed-array.find-last-index': { firefox: '100', ios: '14.5-14.8' },\n 'esnext.array.group': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-by': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-by-to-map': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-to-map': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-reversed': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-sorted': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-spliced': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.unique-by': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.with': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-reversed': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-sorted': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-spliced': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.with': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'web.dom-exception.stack': { chrome: '100', edge: '101', ios: '14.5-14.8', safari: '15.4' },\n 'web.immediate': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'web.structured-clone': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' }\n}\n*/\n```\n\n### `targets` option\n`targets` could be [a `browserslist` query](https://github.com/browserslist/browserslist) or a targets object that specifies minimum environment versions to support:\n```js\n// browserslist query:\n'defaults, not IE 11, maintained node versions';\n// object (sure, all those fields optional):\n({\n android: '4.0', // Android WebView version\n bun: '0.1.2', // Bun version\n chrome: '38', // Chrome version\n 'chrome-android': '18', // Chrome for Android version\n deno: '1.12', // Deno version\n edge: '13', // Edge version\n electron: '5.0', // Electron framework version\n firefox: '15', // Firefox version\n 'firefox-android': '4', // Firefox for Android version\n hermes: '0.11', // Hermes version\n ie: '8', // Internet Explorer version\n ios: '13.0', // iOS Safari version\n node: 'current', // NodeJS version, you can use 'current' for set it to currently used\n opera: '12', // Opera version\n 'opera-android': '7', // Opera for Android version\n phantom: '1.9', // PhantomJS headless browser version\n quest: '5.0', // Meta Quest Browser version\n 'react-native': '0.70', // React Native version (default Hermes engine)\n rhino: '1.7.13', // Rhino engine version\n safari: '14.0', // Safari version\n samsung: '14.0', // Samsung Internet version\n /**\n * true option set target to minimum supporting ES Modules versions of all browsers, ignoring `browsers` target.\n * 'intersect' option intersects the `browsers` target and `browserslist`'s targets. The maximum version will be used.\n */\n esmodules: true | 'intersect',\n browsers: '> 0.25%', // Browserslist query or object with target browsers\n});\n```\n\n### Additional API:\n\n```js\n// equals of of the method from the example above\nrequire('core-js-compat/compat')({ targets, modules, version }); // => { list: Array, targets: { [ModuleName]: { [EngineName]: EngineVersion } } }\n// or\nrequire('core-js-compat').compat({ targets, modules, version }); // => { list: Array, targets: { [ModuleName]: { [EngineName]: EngineVersion } } }\n\n// full compat data:\nrequire('core-js-compat/data'); // => { [ModuleName]: { [EngineName]: EngineVersion } }\n// or\nrequire('core-js-compat').data; // => { [ModuleName]: { [EngineName]: EngineVersion } }\n\n// map of modules by `core-js` entry points:\nrequire('core-js-compat/entries'); // => { [EntryPoint]: Array }\n// or\nrequire('core-js-compat').entries; // => { [EntryPoint]: Array }\n\n// full list of modules:\nrequire('core-js-compat/modules'); // => Array\n// or\nrequire('core-js-compat').modules; // => Array\n\n// the subset of modules which available in the passed `core-js` version:\nrequire('core-js-compat/get-modules-list-for-target-version')('3.51'); // => Array\n// or\nrequire('core-js-compat').getModulesListForTargetVersion('3.51'); // => Array\n```\n\nIf you wanna help to improve this data, you could take a look at the related section of [`CONTRIBUTING.md`](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md#how-to-update-core-js-compat-data). The visualization of compatibility data and the browser tests runner is available [here](http://zloirock.github.io/core-js/master/compat/), the example:\n\n\n","isInternal":false,"tokens":2512,"sizeBytes":8205},{"name":"README.md","path":"packages/core-js-pure/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js-pure/README.md","title":"core-js-pure Documentation","category":"plugin-manifest","format":"markdown","content":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-pure) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a version without global namespace pollution (the third example), for more info see [`core-js` documentation](https://core-js.io)**.\n","isInternal":false,"tokens":1962,"sizeBytes":6189},{"name":"README.md","path":"packages/core-js/actual/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/actual/README.md","title":"actual Documentation","category":"plugin-manifest","format":"markdown","content":"This folder contains entry points for all `core-js` features with dependencies. It's the recommended way for usage only required features.\n","isInternal":false,"tokens":26,"sizeBytes":139},{"name":"README.md","path":"packages/core-js/es/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/es/README.md","title":"es Documentation","category":"plugin-manifest","format":"markdown","content":"This folder contains entry points for [stable ECMAScript features](https://github.com/zloirock/core-js/#ecmascript) with dependencies.\n","isInternal":false,"tokens":31,"sizeBytes":135},{"name":"README.md","path":"packages/core-js/full/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/full/README.md","title":"full Documentation","category":"plugin-manifest","format":"markdown","content":"This folder contains entry points for all `core-js` features with dependencies. It's the recommended way for usage only required features.\n","isInternal":false,"tokens":26,"sizeBytes":139},{"name":"README.md","path":"packages/core-js/internals/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/internals/README.md","title":"internals Documentation","category":"plugin-manifest","format":"markdown","content":"This folder contains internal parts of `core-js` like helpers.\n","isInternal":false,"tokens":13,"sizeBytes":63},{"name":"README.md","path":"packages/core-js/modules/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/modules/README.md","title":"modules Documentation","category":"plugin-manifest","format":"markdown","content":"This folder contains implementations of polyfills. It's not recommended to include in your projects directly if you don't completely understand what are you doing.\n","isInternal":false,"tokens":29,"sizeBytes":164},{"name":"README.md","path":"packages/core-js/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/README.md","title":"core-js Documentation","category":"plugin-manifest","format":"markdown","content":"\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a global version (first 2 examples), for more info see [`core-js` documentation](https://core-js.io).**\n","isInternal":false,"tokens":1950,"sizeBytes":6135},{"name":"README.md","path":"packages/core-js/stable/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/stable/README.md","title":"stable Documentation","category":"plugin-manifest","format":"markdown","content":"This folder contains entry points for all stable `core-js` features with dependencies. It's the recommended way for usage only required features.\n","isInternal":false,"tokens":27,"sizeBytes":146},{"name":"README.md","path":"packages/core-js/stage/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/stage/README.md","title":"stage Documentation","category":"plugin-manifest","format":"markdown","content":"This folder contains entry points for [ECMAScript proposals](https://github.com/zloirock/core-js#ecmascript-proposals) with dependencies.\n","isInternal":false,"tokens":33,"sizeBytes":138},{"name":"README.md","path":"packages/core-js/web/README.md","rawUrl":"https://raw.githubusercontent.com/zloirock/core-js/HEAD/packages/core-js/web/README.md","title":"web Documentation","category":"plugin-manifest","format":"markdown","content":"This folder contains entry points for features from [WHATWG / W3C](https://github.com/zloirock/core-js#web-standards) with dependencies.\n","isInternal":false,"tokens":35,"sizeBytes":137}],"systemPromptSnippet":"\n\n\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-builder)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\nFor some cases could be useful to exclude some [`core-js`](https://core-js.io) features or generate a polyfill for target engines. This API helps conditionally include or exclude certain parts of [`core-js`](https://core-js.io) and build for targets. `modules`, `exclude` and `targets` options are specified in [the `core-js-compat` format](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat).\n\n```js\nimport builder from 'core-js-builder';\n\nconst bundle = await builder({\n // entry / module / namespace / an array of them, by default - all `core-js` modules\n modules: ['core-js/actual', /^esnext\\.reflect\\./],\n // a blacklist of entries / modules / namespaces, by default - empty list\n exclude: [/^es\\.math\\./, 'es.number.constructor'],\n // optional browserslist or core-js-compat format query\n targets: '> 0.5%, not dead, ie 9-11',\n // shows summary for the bundle, disabled by default\n summary: {\n // in the console, you could specify required parts or set `true` for enable all of them\n console: { size: true, modules: false },\n // in the comment in the target file, similarly to `summary.console`\n comment: { size: false, modules: true },\n },\n // output format, 'bundle' by default, can be 'cjs' or 'esm', and in this case\n // the result will not be bundled and will contain imports of required modules\n format: 'bundle',\n // optional target filename, if it's missed a file will not be created\n filename: PATH_TO_MY_COREJS_BUNDLE,\n});\n```\n\nℹ️ When using TypeScript, make sure to set `esModuleInterop` to `true`.\n\n\n\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-bundle)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a bundled global version, for more info see [`core-js` documentation](https://core-js.io).**\n\n\n\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-compat) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n[`core-js-compat` package](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat) contains data about the necessity of [`core-js`](https://core-js.io) modules and API for getting a list of required core-js modules by browserslist query.\n\n```js\nimport compat from 'core-js-compat';\n\nconst {\n list, // array of required modules\n targets, // object with targets for each module\n} = compat({\n targets: '> 1%', // browserslist query or object of minimum environment versions to support, see below\n modules: [ // optional list / filter of modules - regex, string or an array of them:\n 'core-js/actual', // - an entry point\n 'esnext.array.unique-by', // - a module name (or just a start of a module name)\n /^web\\./, // - regex that a module name must satisfy\n ],\n exclude: [ // optional list / filter of modules to exclude, the signature is similar to `modules` option\n 'web.atob',\n ],\n version: '3.51', // used `core-js` version, by default - the latest\n inverse: false, // inverse of the result - shows modules that are NOT required for the target environment\n});\n\nconsole.log(targets);\n/* =>\n{\n 'es.error.cause': { ios: '14.5-14.8' },\n 'es.aggregate-error.cause': { ios: '14.5-14.8' },\n 'es.array.at': { ios: '14.5-14.8' },\n 'es.array.find-last': { firefox: '100', ios: '14.5-14.8' },\n 'es.array.find-last-index': { firefox: '100', ios: '14.5-14.8' },\n 'es.array.includes': { firefox: '100' },\n 'es.array.push': { chrome: '100', edge: '101', ios: '14.5-14.8', safari: '15.4' },\n 'es.array.unshift': { ios: '14.5-14.8', safari: '15.4' },\n 'es.object.has-own': { ios: '14.5-14.8' },\n 'es.regexp.flags': { chrome: '100', edge: '101' },\n 'es.string.at-alternative': { ios: '14.5-14.8' },\n 'es.typed-array.at': { ios: '14.5-14.8' },\n 'es.typed-array.find-last': { firefox: '100', ios: '14.5-14.8' },\n 'es.typed-array.find-last-index': { firefox: '100', ios: '14.5-14.8' },\n 'esnext.array.group': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-by': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-by-to-map': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.group-to-map': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-reversed': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-sorted': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.to-spliced': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.unique-by': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.array.with': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-reversed': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-sorted': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.to-spliced': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'esnext.typed-array.with': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'web.dom-exception.stack': { chrome: '100', edge: '101', ios: '14.5-14.8', safari: '15.4' },\n 'web.immediate': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' },\n 'web.structured-clone': { chrome: '100', edge: '101', firefox: '100', ios: '14.5-14.8', safari: '15.4' }\n}\n*/\n```\n\n### `targets` option\n`targets` could be [a `browserslist` query](https://github.com/browserslist/browserslist) or a targets object that specifies minimum environment versions to support:\n```js\n// browserslist query:\n'defaults, not IE 11, maintained node versions';\n// object (sure, all those fields optional):\n({\n android: '4.0', // Android WebView version\n bun: '0.1.2', // Bun version\n chrome: '38', // Chrome version\n 'chrome-android': '18', // Chrome for Android version\n deno: '1.12', // Deno version\n edge: '13', // Edge version\n electron: '5.0', // Electron framework version\n firefox: '15', // Firefox version\n 'firefox-android': '4', // Firefox for Android version\n hermes: '0.11', // Hermes version\n ie: '8', // Internet Explorer version\n ios: '13.0', // iOS Safari version\n node: 'current', // NodeJS version, you can use 'current' for set it to currently used\n opera: '12', // Opera version\n 'opera-android': '7', // Opera for Android version\n phantom: '1.9', // PhantomJS headless browser version\n quest: '5.0', // Meta Quest Browser version\n 'react-native': '0.70', // React Native version (default Hermes engine)\n rhino: '1.7.13', // Rhino engine version\n safari: '14.0', // Safari version\n samsung: '14.0', // Samsung Internet version\n /**\n * true option set target to minimum supporting ES Modules versions of all browsers, ignoring `browsers` target.\n * 'intersect' option intersects the `browsers` target and `browserslist`'s targets. The maximum version will be used.\n */\n esmodules: true | 'intersect',\n browsers: '> 0.25%', // Browserslist query or object with target browsers\n});\n```\n\n### Additional API:\n\n```js\n// equals of of the method from the example above\nrequire('core-js-compat/compat')({ targets, modules, version }); // => { list: Array, targets: { [ModuleName]: { [EngineName]: EngineVersion } } }\n// or\nrequire('core-js-compat').compat({ targets, modules, version }); // => { list: Array, targets: { [ModuleName]: { [EngineName]: EngineVersion } } }\n\n// full compat data:\nrequire('core-js-compat/data'); // => { [ModuleName]: { [EngineName]: EngineVersion } }\n// or\nrequire('core-js-compat').data; // => { [ModuleName]: { [EngineName]: EngineVersion } }\n\n// map of modules by `core-js` entry points:\nrequire('core-js-compat/entries'); // => { [EntryPoint]: Array }\n// or\nrequire('core-js-compat').entries; // => { [EntryPoint]: Array }\n\n// full list of modules:\nrequire('core-js-compat/modules'); // => Array\n// or\nrequire('core-js-compat').modules; // => Array\n\n// the subset of modules which available in the passed `core-js` version:\nrequire('core-js-compat/get-modules-list-for-target-version')('3.51'); // => Array\n// or\nrequire('core-js-compat').getModulesListForTargetVersion('3.51'); // => Array\n```\n\nIf you wanna help to improve this data, you could take a look at the related section of [`CONTRIBUTING.md`](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md#how-to-update-core-js-compat-data). The visualization of compatibility data and the browser tests runner is available [here](http://zloirock.github.io/core-js/master/compat/), the example:\n\n\n\n\n\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js-pure) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a version without global namespace pollution (the third example), for more info see [`core-js` documentation](https://core-js.io)**.\n\n\nThis folder contains entry points for all `core-js` features with dependencies. It's the recommended way for usage only required features.\n\n\nThis folder contains entry points for [stable ECMAScript features](https://github.com/zloirock/core-js/#ecmascript) with dependencies.\n\n\nThis folder contains entry points for all `core-js` features with dependencies. It's the recommended way for usage only required features.\n\n\nThis folder contains internal parts of `core-js` like helpers.\n\n\nThis folder contains implementations of polyfills. It's not recommended to include in your projects directly if you don't completely understand what are you doing.\n\n\n\n\n\n\n[](https://opencollective.com/core-js) [](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md) [](https://www.npmjs.com/package/core-js) [](https://npm-stat.com/charts.html?package=core-js&package=core-js-pure&package=core-js-compat&from=2014-11-18)\n\n
\n\n**I highly recommend reading this: [So, what's next?](https://github.com/zloirock/core-js/blob/master/docs/2023-02-14-so-whats-next.md)**\n---\n\n> [`core-js`](https://core-js.io) is a modular standard library for JavaScript. Includes polyfills for ECMAScript up to 2026: [promises](https://core-js.io/docs/features/ecmascript/promise), [symbols](https://core-js.io/docs/features/ecmascript/symbol), [collections](https://core-js.io/docs/features/ecmascript/collections), [iterators](https://core-js.io/docs/features/ecmascript/iterator), [typed arrays](https://core-js.io/docs/features/ecmascript/typed-arrays), many other features, ECMAScript proposals, some cross-platform WHATWG / W3C features and proposals like [`URL`](https://core-js.io/docs/features/web-standards/url-and-urlsearchparams). You can load only required features or use it without global namespace pollution.\n\n## Raising funds\n\n`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**](https://opencollective.com/core-js), [**Patreon**](https://patreon.com/zloirock), [**Boosty**](https://boosty.to/zloirock), **Bitcoin ( bc1qlea7544qtsmj2rayg0lthvza9fau63ux0fstcz )**, [**Alipay**](https://user-images.githubusercontent.com/2213682/219464783-c17ad329-17ce-4795-82a7-f609493345ed.png).\n\n---\n\n\n\n---\n\n\n\n---\n\n[*Example of usage*](https://tinyurl.com/28zqjbun):\n```js\nimport 'core-js/actual';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*You can load only required features*:\n```js\nimport 'core-js/actual/promise';\nimport 'core-js/actual/set';\nimport 'core-js/actual/iterator';\nimport 'core-js/actual/array/from';\nimport 'core-js/actual/array/flat-map';\nimport 'core-js/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nArray.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\n[1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n*Or use it without global namespace pollution*:\n```js\nimport Promise from 'core-js-pure/actual/promise';\nimport Set from 'core-js-pure/actual/set';\nimport Iterator from 'core-js-pure/actual/iterator';\nimport from from 'core-js-pure/actual/array/from';\nimport flatMap from 'core-js-pure/actual/array/flat-map';\nimport structuredClone from 'core-js-pure/actual/structured-clone';\n\nPromise.try(() => 42).then(it => console.log(it)); // => 42\n\nfrom(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5]\n\nflatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2]\n\nIterator.concat([1, 2], function * (i) { while (true) yield i++; }(3))\n .drop(1).take(5)\n .filter(it => it % 2)\n .map(it => it ** 2)\n .toArray(); // => [9, 25]\n\nstructuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])\n```\n\n**It's a global version (first 2 examples), for more info see [`core-js` documentation](https://core-js.io).**\n\n\nThis folder contains entry points for all stable `core-js` features with dependencies. It's the recommended way for usage only required features.\n\n\nThis folder contains entry points for [ECMAScript proposals](https://github.com/zloirock/core-js#ecmascript-proposals) with dependencies.\n\n\nThis folder contains entry points for features from [WHATWG / W3C](https://github.com/zloirock/core-js#web-standards) with dependencies.\n"}