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‎CHANGELOG.md‎

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# Changelog
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### Unreleased
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- Nothing
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### [3.46.0 - 2025.10.09](https://github.com/zloirock/core-js/releases/tag/v3.46.0)
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- Changes [v3.45.1...v3.46.0](https://github.com/zloirock/core-js/compare/v3.45.1...v3.46.0) (116 commits)
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- [`Map` upsert stage 3 proposal](https://github.com/tc39/proposal-upsert):
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- Fixed [a FF `WeakMap.prototype.getOrInsertComputed` bug with callback calling before validation a key](https://bugzilla.mozilla.org/show_bug.cgi?id=1988369)
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- [`Iterator` chunking proposal](https://github.com/tc39/proposal-iterator-chunking):

‎README.md‎

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### Installation:[⬆](#index)
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```sh
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// global version
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npm install --save core-js@3.45.1
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npm install --save core-js@3.46.0
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// version without global namespace pollution
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npm install --save core-js-pure@3.45.1
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npm install --save core-js-pure@3.46.0
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// bundled global version
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npm install --save core-js-bundle@3.45.1
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npm install --save core-js-bundle@3.46.0
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```
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Or you can use `core-js` [from CDN](https://www.jsdelivr.com/package/npm/core-js-bundle).
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#### `@babel/preset-env`[⬆](#index)
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[`@babel/preset-env`](https://github.com/babel/babel/tree/master/packages/babel-preset-env) has `useBuiltIns` option, which optimizes the use of the global version of `core-js`. With `useBuiltIns` option, you should also set `corejs` option to the used version of `core-js`, like `corejs: '3.45'`.
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[`@babel/preset-env`](https://github.com/babel/babel/tree/master/packages/babel-preset-env) has `useBuiltIns` option, which optimizes the use of the global version of `core-js`. With `useBuiltIns` option, you should also set `corejs` option to the used version of `core-js`, like `corejs: '3.46'`.
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> [!IMPORTANT]
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> It is recommended to specify the used minor `core-js` version, like `corejs: '3.45'`, instead of `corejs: 3`, since with `corejs: 3` will not be injected modules which were added in minor `core-js` releases.
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> It is recommended to specify the used minor `core-js` version, like `corejs: '3.46'`, instead of `corejs: 3`, since with `corejs: 3` will not be injected modules which were added in minor `core-js` releases.
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---
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var array = Array.of(1, 2, 3);
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```
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By default, `@babel/preset-env` with `useBuiltIns: 'usage'` option only polyfills stable features, but you can enable polyfilling of proposals by the `proposals` option, as `corejs: { version: '3.45', proposals: true }`.
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By default, `@babel/preset-env` with `useBuiltIns: 'usage'` option only polyfills stable features, but you can enable polyfilling of proposals by the `proposals` option, as `corejs: { version: '3.46', proposals: true }`.
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> [!IMPORTANT]
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> In the case of `useBuiltIns: 'usage'`, you should not add `core-js` imports by yourself, they will be added automatically.
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"env": {
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"targets": "> 0.25%, not dead",
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"mode": "entry",
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"coreJs": "3.45"
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"coreJs": "3.46"
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}
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}
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```

‎deno/corejs/README.md‎

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*Example*:
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```js
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import 'https://deno.land/x/corejs@v3.45.1/index.js'; // <- at the top of your entry point
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import 'https://deno.land/x/corejs@v3.46.0/index.js'; // <- at the top of your entry point
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Object.hasOwn({ foo: 42 }, 'foo'); // => true
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‎deno/corejs/index.js‎

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/**
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* core-js 3.45.1
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* core-js 3.46.0
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* © 2014-2025 Denis Pushkarev (zloirock.ru)
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* license: https://github.com/zloirock/core-js/blob/v3.45.1/LICENSE
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* license: https://github.com/zloirock/core-js/blob/v3.46.0/LICENSE
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* source: https://github.com/zloirock/core-js
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*/
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!function (undefined) { 'use strict'; /******/ (function(modules) { // webpackBootstrap
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var store = module.exports = globalThis[SHARED] || defineGlobalProperty(SHARED, {});
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(store.versions || (store.versions = [])).push({
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version: '3.45.1',
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version: '3.46.0',
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mode: IS_PURE ? 'pure' : 'global',
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copyright: '© 2014-2025 Denis Pushkarev (zloirock.ru)',
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license: 'https://github.com/zloirock/core-js/blob/v3.45.1/LICENSE',
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copyright: '© 2014-2025 Denis Pushkarev (zloirock.ru), 2025 CoreJS Company (core-js.io)',
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license: 'https://github.com/zloirock/core-js/blob/v3.46.0/LICENSE',
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source: 'https://github.com/zloirock/core-js'
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});
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"use strict";
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var $ = __webpack_require__(49);
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var createProperty = __webpack_require__(149);
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var getBuiltIn = __webpack_require__(35);
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var uncurryThis = __webpack_require__(6);
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var aCallable = __webpack_require__(38);
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// in some IE versions, `hasOwnProperty` returns incorrect result on integer keys
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// but since it's a `null` prototype object, we can safely use `in`
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if (key in obj) push(obj[key], value);
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else obj[key] = [value];
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else createProperty(obj, key, [value]);
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});
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return obj;
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}
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// https://github.com/tc39/proposal-iterator-chunking
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$({ target: 'Iterator', proto: true, real: true, forced: true }, {
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sliding: function sliding(windowSize) {
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return iteratorWindow(this, windowSize, true);
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return iteratorWindow(this, windowSize, 'allow-partial');
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}
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});
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var uncurryThis = __webpack_require__(6);
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var $RangeError = RangeError;
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var $TypeError = TypeError;
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var push = uncurryThis([].push);
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var slice = uncurryThis([].slice);
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var ALLOW_PARTIAL = 'allow-partial';
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var IteratorProxy = createIteratorProxy(function () {
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var iterator = this.iterator;
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var next = this.next;
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var buffer = this.buffer;
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var windowSize = this.windowSize;
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var sliding = this.sliding;
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var allowPartial = this.allowPartial;
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var result, done;
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while (true) {
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result = anObject(call(next, iterator));
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done = this.done = !!result.done;
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if (sliding && done && buffer.length && buffer.length < windowSize) return createIterResultObject(buffer, false);
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if (allowPartial && done && buffer.length && buffer.length < windowSize) return createIterResultObject(buffer, false);
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if (done) return createIterResultObject(undefined, true);
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if (buffer.length === windowSize) this.buffer = buffer = slice(buffer, 1);
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}
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}, false, true);
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// `Iterator.prototype.sliding` and `Iterator.prototype.windows` methods
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// `Iterator.prototype.windows` and obsolete `Iterator.prototype.sliding` methods
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// https://github.com/tc39/proposal-iterator-chunking
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module.exports = function (O, windowSize, sliding) {
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module.exports = function (O, windowSize, undersized) {
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anObject(O);
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if (typeof windowSize != 'number' || !windowSize || windowSize >>> 0 !== windowSize) {
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return iteratorClose(O, 'throw', new $RangeError('windowSize must be integer in [1, 2^32-1]'));
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return iteratorClose(O, 'throw', new $RangeError('`windowSize` must be integer in [1, 2^32-1]'));
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}
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if (undersized !== undefined && undersized !== 'only-full' && undersized !== ALLOW_PARTIAL) {
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return iteratorClose(O, 'throw', new $TypeError('Incorrect `undersized` argument'));
1247812484
}
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return new IteratorProxy(getIteratorDirect(O), {
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windowSize: windowSize,
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buffer: [],
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sliding: sliding
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allowPartial: undersized === ALLOW_PARTIAL
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});
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};
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// `Iterator.prototype.windows` method
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// https://github.com/tc39/proposal-iterator-chunking
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$({ target: 'Iterator', proto: true, real: true, forced: true }, {
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windows: function windows(windowSize) {
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return iteratorWindow(this, windowSize, false);
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windows: function windows(windowSize /* , undersized */) {
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return iteratorWindow(this, windowSize, arguments.length < 2 ? undefined : arguments[1]);
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}
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});
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for (var i = 0; i < iterCount; i++) {
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var iter = iters[i];
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if (iter === null) {
12688-
push(results, padding[i]);
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result = padding[i];
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} else {
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try {
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result = call(iter.next, iter.iterator);
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var $ = __webpack_require__(49);
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var anObject = __webpack_require__(30);
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var anObjectOrUndefined = __webpack_require__(278);
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var createProperty = __webpack_require__(149);
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var call = __webpack_require__(33);
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var uncurryThis = __webpack_require__(6);
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var getBuiltIn = __webpack_require__(35);
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return iteratorZip(iters, mode, padding, function (results) {
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var obj = create(null);
1282812835
for (var j = 0; j < iterCount; j++) {
12829-
obj[keys[j]] = results[j];
12836+
createProperty(obj, keys[j], results[j]);
1283012837
}
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return obj;
1283212839
});
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var has = WeakMapHelpers.has;
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var set = WeakMapHelpers.set;
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var FORCED = IS_PURE || !function () {
16295+
try {
16296+
// eslint-disable-next-line es/no-weak-map, no-throw-literal -- testing
16297+
if (WeakMap.prototype.getOrInsertComputed) new WeakMap().getOrInsertComputed(1, function () { throw 1; });
16298+
} catch (error) {
16299+
// FF144 Nightly - Beta 3 bug
16300+
// https://bugzilla.mozilla.org/show_bug.cgi?id=1988369
16301+
return error instanceof TypeError;
16302+
}
16303+
}();
16304+
1628716305
// `WeakMap.prototype.getOrInsertComputed` method
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// https://github.com/tc39/proposal-upsert
16289-
$({ target: 'WeakMap', proto: true, real: true, forced: IS_PURE }, {
16307+
$({ target: 'WeakMap', proto: true, real: true, forced: FORCED }, {
1629016308
getOrInsertComputed: function getOrInsertComputed(key, callbackfn) {
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aWeakMap(this);
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aWeakKey(key);

‎docs/web/docs/usage.md‎

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## Installation
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```sh
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// global version
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npm install --save core-js@3.45.0
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npm install --save core-js@3.46.0
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// version without global namespace pollution
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npm install --save core-js-pure@3.45.0
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npm install --save core-js-pure@3.46.0
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// bundled global version
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npm install --save core-js-bundle@3.45.0
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npm install --save core-js-bundle@3.46.0
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```
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Or you can use `core-js` [from CDN](https://www.jsdelivr.com/package/npm/core-js-bundle).
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9595
## `@babel/preset-env`
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[`@babel/preset-env`](https://github.com/babel/babel/tree/master/packages/babel-preset-env) has `useBuiltIns` option, which optimizes the use of the global version of `core-js`. With `useBuiltIns` option, you should also set `corejs` option to the used version of `core-js`, like `corejs: '3.45'`.
97+
[`@babel/preset-env`](https://github.com/babel/babel/tree/master/packages/babel-preset-env) has `useBuiltIns` option, which optimizes the use of the global version of `core-js`. With `useBuiltIns` option, you should also set `corejs` option to the used version of `core-js`, like `corejs: '3.46'`.
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9999
> [!IMPORTANT]
100-
> It is recommended to specify the used minor `core-js` version, like `corejs: '3.45'`, instead of `corejs: 3`, since with `corejs: 3` will not be injected modules which were added in minor `core-js` releases.
100+
> It is recommended to specify the used minor `core-js` version, like `corejs: '3.46'`, instead of `corejs: 3`, since with `corejs: 3` will not be injected modules which were added in minor `core-js` releases.
101101
102102
---
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158158
var array = Array.of(1, 2, 3);
159159
```
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By default, `@babel/preset-env` with `useBuiltIns: 'usage'` option only polyfills stable features, but you can enable polyfilling of proposals by the `proposals` option, as `corejs: { version: '3.45', proposals: true }`.
161+
By default, `@babel/preset-env` with `useBuiltIns: 'usage'` option only polyfills stable features, but you can enable polyfilling of proposals by the `proposals` option, as `corejs: { version: '3.46', proposals: true }`.
162162

163163
> [!IMPORTANT]
164164
> In the case of `useBuiltIns: 'usage'`, you should not add `core-js` imports by yourself, they will be added automatically.
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196196
"env": {
197197
"targets": "> 0.25%, not dead",
198198
"mode": "entry",
199-
"coreJs": "3.45"
199+
"coreJs": "3.46"
200200
}
201201
}
202202
```

‎package-lock.json‎

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Some generated files are not rendered by default. Learn more about customizing how changed files appear on GitHub.

‎package.json‎

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{
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"version": "3.45.1",
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"version": "3.46.0",
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"repository": {
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"type": "git",
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"url": "https://github.com/zloirock/core-js.git"

‎packages/core-js-builder/package.json‎

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{
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"name": "core-js-builder",
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"version": "3.45.1",
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"version": "3.46.0",
44
"type": "commonjs",
55
"description": "core-js builder",
66
"repository": {
@@ -26,8 +26,8 @@
2626
"main": "index.js",
2727
"types": "index.d.ts",
2828
"dependencies": {
29-
"core-js": "3.45.1",
30-
"core-js-compat": "3.45.1",
29+
"core-js": "3.46.0",
30+
"core-js-compat": "3.46.0",
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"mkdirp": ">=0.5.6 <1",
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"webpack": ">=4.47.0 <5"
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},

‎packages/core-js-bundle/package.json‎

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{
22
"name": "core-js-bundle",
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"version": "3.45.1",
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"version": "3.46.0",
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"type": "commonjs",
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"description": "Standard library",
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"keywords": [

‎packages/core-js-compat/README.md‎

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exclude: [ // optional list / filter of modules to exclude, the signature is similar to `modules` option
2828
'web.atob',
2929
],
30-
version: '3.45', // used `core-js` version, by default - the latest
30+
version: '3.46', // used `core-js` version, by default - the latest
3131
inverse: false, // inverse of the result - shows modules that are NOT required for the target environment
3232
});
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@@ -129,9 +129,9 @@ require('core-js-compat/modules'); // => Array<ModuleName>
129129
require('core-js-compat').modules; // => Array<ModuleName>
130130

131131
// the subset of modules which available in the passed `core-js` version:
132-
require('core-js-compat/get-modules-list-for-target-version')('3.45'); // => Array<ModuleName>
132+
require('core-js-compat/get-modules-list-for-target-version')('3.46'); // => Array<ModuleName>
133133
// or
134-
require('core-js-compat').getModulesListForTargetVersion('3.45'); // => Array<ModuleName>
134+
require('core-js-compat').getModulesListForTargetVersion('3.46'); // => Array<ModuleName>
135135
```
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If 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:

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