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78 lines
1.9 KiB
Markdown
78 lines
1.9 KiB
Markdown
# babel-plugin-polyfill-corejs3
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## Install
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Using npm:
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```sh
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npm install --save-dev babel-plugin-polyfill-corejs3
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```
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or using yarn:
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```sh
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yarn add babel-plugin-polyfill-corejs3 --dev
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```
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## Usage
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Add this plugin to your Babel configuration:
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```json
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{
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"plugins": [["polyfill-corejs3", { "method": "usage-global", "version": "3.20" }]]
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}
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```
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This package supports the `usage-pure`, `usage-global`, and `entry-global` methods.
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When `entry-global` is used, it replaces imports to `core-js`.
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## Options
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See [here](../../docs/usage.md#options) for a list of options supported by every polyfill provider.
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### `version`
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`string`, defaults to `"3.0"`.
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This option only has an effect when used alongside `"method": "usage-global"` or `"method": "usage-pure"`. It is recommended to specify the minor version you are using as `core-js@3.0` may not include polyfills for the latest features. If you are bundling an app, you can provide the version directly from your node modules:
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```js
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{
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plugins: [
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["polyfill-corejs3", {
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"method": "usage-pure",
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// use `core-js/package.json` if you are using `usage-global`
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"version": require("core-js-pure/package.json").version
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}]
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]
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}
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```
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If you are a library author, specify a reasonably modern `core-js` version in your
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`package.json` and provide the plugin the minimal supported version.
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```json
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{
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"dependencies": {
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"core-js": "^3.20.0"
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}
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}
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```
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```js
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{
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plugins: [
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["polyfill-corejs3", {
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"method": "usage-global",
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// improvise if you have more complicated version spec, e.g. > 3.1.4
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"version": require("./package.json").dependencies["core-js"]
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}]
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]
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}
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```
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### `proposals`
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`boolean`, defaults to `false`.
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This option only has an effect when used alongside `"method": "usage-global"` or `"method": "usage-pure"`. When `proposals` are `true`, any ES proposal supported by core-js will be polyfilled as well. |