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Packages: Change how required built-ins are polyfilled with Babel 7 #9171

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Sep 5, 2018
Merged

Packages: Change how required built-ins are polyfilled with Babel 7 #9171

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1e8a59e
Packages: Change how required built-ins are polyfilled
gziolo Aug 20, 2018
be60873
Optimize Babel config for the distribution code
gziolo Aug 20, 2018
117eb9e
Improve Babel configuration for packages
gziolo Aug 21, 2018
4b796a4
Update dependencies for token-list package
gziolo Aug 21, 2018
dd46891
Revert incorrect config for packages module code
gziolo Aug 22, 2018
f2f4aa6
Docs: Add information about polyfills for each package that needs them
gziolo Aug 24, 2018
38810d9
Update Babel to 7.0.0 version
gziolo Aug 28, 2018
582dbcf
Update message about the need of using polyfills with packages
gziolo Aug 28, 2018
16f445c
Fix some dependencies in the root folder
gziolo Aug 30, 2018
6c2d121
Docs: Update all changelogs related to this PR
gziolo Aug 30, 2018
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2 changes: 1 addition & 1 deletion CONTRIBUTING.md
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Expand Up @@ -141,7 +141,7 @@ When creating a new package you need to provide at least the following:
"module": "build-module/index.js",
"react-native": "src/index",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56"
"@babel/runtime": "^7.0.0"
},
"publishConfig": {
"access": "public"
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50 changes: 38 additions & 12 deletions bin/packages/get-babel-config.js
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Expand Up @@ -19,29 +19,55 @@ if ( ! process.env.SKIP_JSX_PRAGMA_TRANSFORM ) {
} ] );
}

const overrideOptions = ( target, targetName, options ) => {
if ( get( target, [ 'file', 'request' ] ) === targetName ) {
return [ targetName, Object.assign(
{},
target.options,
options
) ];
}
return target;
};

const babelConfigs = {
main: Object.assign(
{},
babelDefaultConfig,
{
plugins,
presets: map( babelDefaultConfig.presets, ( preset ) => {
if ( get( preset, [ 'file', 'request' ] ) === '@babel/preset-env' ) {
return [ '@babel/preset-env', Object.assign(
{},
preset.options,
{ modules: 'commonjs' }
) ];
}
return preset;
} ),
plugins: map(
plugins,
( plugin ) => overrideOptions( plugin, '@babel/plugin-transform-runtime', {
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I'm not certain we need this plugin anymore because we're using useBuiltIns: true. Any idea @aduth In my understanding the runtime is a subset of the polyfills (added by preset-env).

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Just read the docs https://babeljs.io/docs/en/next/babel-polyfill and https://babeljs.io/docs/en/next/babel-plugin-transform-runtime and I think it confirms my thoughts that we should just get rid of the runtime.

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We should be using useBuiltIns: false, not true and using the transform runtime. We should not be shipping polyfills that modify global prototypes.

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@blowery We are using useBuiltIns: false in the packages (npm) but I was referring to useBuiltIns: true used for Gutenberg.

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This raises the question of whether we should keep the runtime transform for the packages. I personally don't see any difference between those polyfills and the remaining ones not included in the runtime (aside from the way they are included), which means I think we should remove all the polyfills and not only the ones added by babel-preset-env

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I'm not quite sure. I followed the configuration from Calypso which was reviewed by @hzoo 😄

It has both @babel/preset-env with useBuiltIns: "entry" (https://github.com/Automattic/wp-calypso/blob/master/babel.config.js#L22) and @babel/plugin-transform-runtime with corejs: false (https://github.com/Automattic/wp-calypso/blob/master/babel.config.js#L51).

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Still not sure what's the point of @babel/plugin-transform-runtime if you do corejs: false. I guess there are some helpers but aren't these also polyfills?

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Yes, there are Babel helpers that are not polyfills. When transpiling classes, for example, Babel uses helper functions with names like _classCallCheck, _possibleConstructorReturn or _inherits. The runtime transform plugin prevents them from being duplicated all the time and imports them from @babel/runtime/helpers instead.

Another thing that is not a CoreJS polyfill is the regenerator runtime used when transpiling generators and async/await.

The CoreJS and regenerator are "polyfills" in a sense that they might be provided by the platform already. Babel helpers never are though.

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Thanks for the explanation @jsnajdr it makes sense 👍

corejs: false,
} )
),
presets: map(
babelDefaultConfig.presets,
( preset ) => overrideOptions( preset, '@babel/preset-env', {
modules: 'commonjs',
useBuiltIns: false,
} )
),
}
),
module: Object.assign(
{},
babelDefaultConfig,
{
plugins,
plugins: map(
plugins,
( plugin ) => overrideOptions( plugin, '@babel/plugin-transform-runtime', {
corejs: false,
useESModules: true,
} )
),
presets: map(
babelDefaultConfig.presets,
( preset ) => overrideOptions( preset, '@babel/preset-env', {
modules: false,
useBuiltIns: false,
} )
),
}
),
};
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1,337 changes: 485 additions & 852 deletions package-lock.json
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5 changes: 3 additions & 2 deletions package.json
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Expand Up @@ -58,7 +58,8 @@
"rememo": "3.0.0"
},
"devDependencies": {
"@babel/core": "7.0.0-beta.56",
"@babel/core": "7.0.0",
"@babel/runtime-corejs2": "7.0.0",
"@wordpress/babel-plugin-import-jsx-pragma": "file:packages/babel-plugin-import-jsx-pragma",
"@wordpress/babel-plugin-makepot": "file:packages/babel-plugin-makepot",
"@wordpress/babel-preset-default": "file:packages/babel-preset-default",
Expand All @@ -72,7 +73,7 @@
"@wordpress/scripts": "file:packages/scripts",
"autoprefixer": "8.2.0",
"babel-eslint": "8.0.3",
"babel-loader": "8.0.0-beta.4",
"babel-loader": "8.0.0",
"chalk": "2.4.1",
"check-node-version": "3.1.1",
"codecov": "3.0.2",
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6 changes: 6 additions & 0 deletions packages/a11y/CHANGELOG.md
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## 2.0.0 (Unreleased)

### Breaking Change

- Change how required built-ins are polyfilled with Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)). If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods.

## 1.1.0 (2018-07-12)

### New feature
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2 changes: 2 additions & 0 deletions packages/a11y/README.md
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Expand Up @@ -10,6 +10,8 @@ Install the module
npm install @wordpress/a11y --save
```

_This package assumes that your code will run in an **ES2015+** environment. If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods. Learn more about it in [Babel docs](https://babeljs.io/docs/en/next/caveats)._

## speak

Allows you to easily announce dynamic interface updates to screen readers using ARIA live regions. This module is inspired by the `speak` function in wp-a11y.js
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2 changes: 1 addition & 1 deletion packages/a11y/package.json
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Expand Up @@ -21,7 +21,7 @@
"module": "build-module/index.js",
"react-native": "src/index",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56",
"@babel/runtime": "^7.0.0",
"@wordpress/dom-ready": "file:../dom-ready"
},
"publishConfig": {
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5 changes: 5 additions & 0 deletions packages/api-fetch/CHANGELOG.md
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## 2.0.0 (Unreleased)

### Breaking Change

- Change how required built-ins are polyfilled with Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)). If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods.
2 changes: 2 additions & 0 deletions packages/api-fetch/README.md
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Expand Up @@ -10,6 +10,8 @@ Install the module
npm install @wordpress/api-fetch --save
```

_This package assumes that your code will run in an **ES2015+** environment. If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods. Learn more about it in [Babel docs](https://babeljs.io/docs/en/next/caveats)._

## Usage

```js
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2 changes: 1 addition & 1 deletion packages/api-fetch/package.json
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Expand Up @@ -20,7 +20,7 @@
"main": "build/index.js",
"module": "build-module/index.js",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56",
"@babel/runtime": "^7.0.0",
"@wordpress/hooks": "file:../hooks",
"@wordpress/i18n": "file:../i18n"
},
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6 changes: 6 additions & 0 deletions packages/autop/CHANGELOG.md
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@@ -1,3 +1,9 @@
## 2.0.0 (Unreleased)

### Breaking Change

- Change how required built-ins are polyfilled with Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)). If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods.

## 1.1.0 (2018-07-12)

### New Feature
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2 changes: 2 additions & 0 deletions packages/autop/README.md
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Expand Up @@ -10,6 +10,8 @@ Install the module
npm install @wordpress/autop --save
```

_This package assumes that your code will run in an **ES2015+** environment. If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods. Learn more about it in [Babel docs](https://babeljs.io/docs/en/next/caveats)._

### Usage

Import the desired function(s) from `@wordpress/autop`:
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2 changes: 1 addition & 1 deletion packages/autop/package.json
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Expand Up @@ -19,7 +19,7 @@
"main": "build/index.js",
"module": "build-module/index.js",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56"
"@babel/runtime": "^7.0.0"
},
"publishConfig": {
"access": "public"
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5 changes: 5 additions & 0 deletions packages/babel-plugin-import-jsx-pragma/CHANGELOG.md
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## 1.1.0 (Unreleased)

### New Feature

- Plugin updated to work with the stable version of Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)).
8 changes: 4 additions & 4 deletions packages/babel-plugin-import-jsx-pragma/package.json
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Expand Up @@ -26,14 +26,14 @@
"main": "build/index.js",
"module": "build-module/index.js",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56"
"@babel/runtime": "^7.0.0"
},
"devDependencies": {
"@babel/core": "7.0.0-beta.56",
"@babel/plugin-syntax-jsx": "7.0.0-beta.56"
"@babel/core": "^7.0.0",
"@babel/plugin-syntax-jsx": "^7.0.0"
},
"peerDependencies": {
"@babel/core": "7.0.0-beta.56"
"@babel/core": "^7.0.0"
},
"publishConfig": {
"access": "public"
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6 changes: 6 additions & 0 deletions packages/babel-plugin-makepot/CHANGELOG.md
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## 2.1.0 (Unreleased)

### New Feature

- Plugin updated to work with the stable version of Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)).

## 2.0.0 (2018-07-12)

### Breaking Change
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Expand Up @@ -25,16 +25,16 @@
"main": "build/index.js",
"module": "build-module/index.js",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56",
"@babel/runtime": "^7.0.0",
"gettext-parser": "^1.3.1",
"lodash": "^4.17.10"
},
"devDependencies": {
"@babel/core": "7.0.0-beta.56",
"@babel/traverse": "7.0.0-beta.56"
"@babel/core": "^7.0.0",
"@babel/traverse": "^7.0.0"
},
"peerDependencies": {
"@babel/core": "7.0.0-beta.56"
"@babel/core": "^7.0.0"
},
"publishConfig": {
"access": "public"
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## 2.1.0 (Unreleased)

### New Feature

- Plugin updated to work with the stable version of Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)).

## 2.0.0 (2018-07-12)

### Breaking Change
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},
"main": "index.js",
"dependencies": {
"@babel/plugin-proposal-async-generator-functions": "7.0.0-beta.56",
"@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.56",
"@babel/plugin-transform-react-jsx": "7.0.0-beta.56",
"@babel/plugin-transform-runtime": "7.0.0-beta.56",
"@babel/preset-env": "7.0.0-beta.56",
"@babel/runtime-corejs2": "7.0.0-beta.56",
"@babel/plugin-proposal-async-generator-functions": "^7.0.0",
"@babel/plugin-proposal-object-rest-spread": "^7.0.0",
"@babel/plugin-transform-react-jsx": "^7.0.0",
"@babel/plugin-transform-runtime": "^7.0.0",
"@babel/preset-env": "^7.0.0",
"@babel/runtime": "^7.0.0",
"@wordpress/browserslist-config": "file:../browserslist-config",
"babel-core": "^7.0.0-bridge.0"
},
"peerDependencies": {
"@babel/core": "^7.0.0-beta.50"
"@babel/core": "^7.0.0"
},
"publishConfig": {
"access": "public"
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## 2.0.0 (Unreleased)

### Breaking Change

- Change how required built-ins are polyfilled with Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)). If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods.
2 changes: 1 addition & 1 deletion packages/blob/package.json
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"main": "build/index.js",
"module": "build-module/index.js",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56"
"@babel/runtime": "^7.0.0"
},
"publishConfig": {
"access": "public"
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5 changes: 5 additions & 0 deletions packages/block-library/CHANGELOG.md
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## 2.0.0 (Unreleased)

### Breaking Change

- Change how required built-ins are polyfilled with Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)). If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods.
2 changes: 2 additions & 0 deletions packages/block-library/README.md
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Expand Up @@ -10,6 +10,8 @@ Install the module
npm install @wordpress/block-library --save
```

_This package assumes that your code will run in an **ES2015+** environment. If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods. Learn more about it in [Babel docs](https://babeljs.io/docs/en/next/caveats)._

## Usage

```js
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"module": "build-module/index.js",
"react-native": "src/index",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56",
"@babel/runtime": "^7.0.0",
"@wordpress/autop": "file:../autop",
"@wordpress/blob": "file:../blob",
"@wordpress/blocks": "file:../blocks",
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3 changes: 2 additions & 1 deletion packages/blocks/CHANGELOG.md
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## v3.0.0 (Unreleased)
## 3.0.0 (Unreleased)

### Breaking Change

- The `isSharedBlock` function is removed. Use `isReusableBlock` instead.
- Change how required built-ins are polyfilled with Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)). If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods.

### Deprecations

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Expand Up @@ -14,6 +14,16 @@ blog.
The following documentation outlines steps you as a developer will need to
follow to add your own custom blocks to WordPress's editor interfaces.

## Installation

Install the module

```bash
npm install @wordpress/bocks --save
```

_This package assumes that your code will run in an **ES2015+** environment. If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods. Learn more about it in [Babel docs](https://babeljs.io/docs/en/next/caveats)._

## Getting Started

If you're not already accustomed to working with JavaScript in your WordPress
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"module": "build-module/index.js",
"react-native": "src/index",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56",
"@babel/runtime": "^7.0.0",
"@wordpress/autop": "file:../autop",
"@wordpress/blob": "file:../blob",
"@wordpress/block-serialization-spec-parser": "file:../block-serialization-spec-parser",
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3 changes: 2 additions & 1 deletion packages/components/CHANGELOG.md
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## v3.0.0 (Unreleased)
## 3.0.0 (Unreleased)

### Breaking Change

- `withAPIData` has been removed. Please use the Core Data module or `@wordpress/api-fetch` directly instead.
- `wp.components.Draggable` as a DOM node drag handler has been deprecated. Please, use `wp.components.Draggable` as a wrap component for your DOM node drag handler.
- Change how required built-ins are polyfilled with Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)). If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods.

### New Feature

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Expand Up @@ -10,6 +10,8 @@ Install the module
npm install @wordpress/components --save
```

_This package assumes that your code will run in an **ES2015+** environment. If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods. Learn more about it in [Babel docs](https://babeljs.io/docs/en/next/caveats)._

## Usage

Within Gutenberg, these components can be accessed by importing from the `components` root directory:
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"module": "build-module/index.js",
"react-native": "src/index",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56",
"@babel/runtime": "^7.0.0",
"@wordpress/a11y": "file:../a11y",
"@wordpress/api-fetch": "file:../api-fetch",
"@wordpress/compose": "file:../compose",
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## 2.0.0 (Unreleased)

### Breaking Change

- Change how required built-ins are polyfilled with Babel 7 ([#9171](https://github.com/WordPress/gutenberg/pull/9171)). If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods.
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npm install @wordpress/compose --save
```

_This package assumes that your code will run in an **ES2015+** environment. If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using [core-js](https://github.com/zloirock/core-js) or [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods. Learn more about it in [Babel docs](https://babeljs.io/docs/en/next/caveats)._

## Usage

```js
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"module": "build-module/index.js",
"react-native": "src/index",
"dependencies": {
"@babel/runtime-corejs2": "7.0.0-beta.56",
"@babel/runtime": "^7.0.0",
"@wordpress/element": "file:../element",
"@wordpress/is-shallow-equal": "file:../is-shallow-equal",
"lodash": "^4.17.10"
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