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Already bundled version of `core-js`[on CDN](https://unpkg.com/core-js-bundle@3.13.1) ([minified version](https://unpkg.com/core-js-bundle@3.13.1/minified.js)).
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Already bundled version of `core-js`[on CDN](https://unpkg.com/core-js-bundle@3.14.0) ([minified version](https://unpkg.com/core-js-bundle@3.14.0/minified.js)).
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### `postinstall` message[⬆](#index)
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The `core-js` project needs your help, so the package shows a message about it after installation. If it causes problems for you, you can disable it:
[`@babel/preset-env`](https://github.com/babel/babel/tree/master/packages/babel-preset-env) has `useBuiltIns` option, which optimizes working with global version of `core-js`. With `useBuiltIns` option, you should also set `corejs` option to used version of `core-js`, like `corejs: '3.13'`.
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[`@babel/preset-env`](https://github.com/babel/babel/tree/master/packages/babel-preset-env) has `useBuiltIns` option, which optimizes working with global version of `core-js`. With `useBuiltIns` option, you should also set `corejs` option to used version of `core-js`, like `corejs: '3.14'`.
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> **Warning!** Recommended to specify used minor `core-js` version, like `corejs: '3.13'`, 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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> **Warning!** Recommended to specify used minor `core-js` version, like `corejs: '3.14'`, 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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-`useBuiltIns: 'entry'` replaces imports of `core-js` to import only required for a target environment modules. So, for example,
By default, `@babel/preset-env` with `useBuiltIns: 'usage'` option only polyfills stable features, but you can enable polyfilling of proposals by `proposals` option, as `corejs: { version: '3.13', 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 `proposals` option, as `corejs: { version: '3.14', proposals: true }`.
If you want to add new / update data about modules required for target engines, [follow this instruction](https://github.com/zloirock/core-js/blob/master/CONTRIBUTING.md#updating-core-js-compat-data).
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