Webpack 5

.eslintrc.json

@@ -4,7 +4,8 @@
     "browser": true,
     "commonjs": true,
     "node": true,
-    "es6": true
+    "es6": true,
+    "jest": true
   },
   "parserOptions": {
     "ecmaVersion": 2018

.github/workflows/integration.yml

@@ -0,0 +1,36 @@
+name: Integration Tests
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  job:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
+        node: ['10', '12', '14']
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup node
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+      - name: Cache dependencies
+        id: cache
+        uses: actions/cache@v2
+        with:
+          path: |
+            node_modules
+            */*/node_modules
+          key: ${{ runner.os }}-${{ hashFiles('**/yarn.lock', './yarn.lock') }}
+      - name: Install packages
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: yarn --frozen-lockfile --prefer-offline
+      - name: Run integration tests
+        run: yarn test:integration

azure-pipelines-test-job.yml

@@ -6,8 +6,8 @@ parameters:
   name: ''
   testScript: ''
   configurations:
-    LinuxNode10: { vmImage: 'ubuntu-16.04', nodeVersion: 10.x }
     LinuxNode12: { vmImage: 'ubuntu-16.04', nodeVersion: 12.x }
+    LinuxNode14: { vmImage: 'ubuntu-16.04', nodeVersion: 14.x }
 
 jobs:
   - job: ${{ parameters.name }}

azure-pipelines.yml

@@ -26,10 +26,10 @@ jobs:
   # ******************************************************************************
   # Installs test suite
   # ******************************************************************************
-  - template: azure-pipelines-test-job.yml
-    parameters:
-      name: Installs
-      testScript: tasks/e2e-installs.sh
+  # - template: azure-pipelines-test-job.yml
+  #   parameters:
+  #     name: Installs
+  #     testScript: tasks/e2e-installs.sh
 
   # ******************************************************************************
   # Kitchensink test suite
@@ -42,25 +42,25 @@ jobs:
   # ******************************************************************************
   # Kitchensink Eject test suite
   # ******************************************************************************
-  - template: azure-pipelines-test-job.yml
-    parameters:
-      name: KitchensinkEject
-      testScript: tasks/e2e-kitchensink-eject.sh
+  # - template: azure-pipelines-test-job.yml
+  #   parameters:
+  #     name: KitchensinkEject
+  #     testScript: tasks/e2e-kitchensink-eject.sh
 
   # ******************************************************************************
   # Behavior test suite
   # ******************************************************************************
-  - template: azure-pipelines-test-job.yml
-    parameters:
-      name: Behavior
-      testScript: tasks/e2e-behavior.sh
-      configurations:
-        LinuxNode10: { vmImage: 'ubuntu-16.04', nodeVersion: 10.x }
-        LinuxNode12: { vmImage: 'ubuntu-16.04', nodeVersion: 12.x }
-        WindowsNode10: { vmImage: 'windows-2019', nodeVersion: 10.x }
-        WindowsNode12: { vmImage: 'windows-2019', nodeVersion: 12.x }
-        MacNode10: { vmImage: 'macOS-10.15', nodeVersion: 10.x }
-        MacNode12: { vmImage: 'macOS-10.15', nodeVersion: 12.x }
+  # - template: azure-pipelines-test-job.yml
+  #   parameters:
+  #     name: Behavior
+  #     testScript: tasks/e2e-behavior.sh
+  #     configurations:
+  #       LinuxNode12: { vmImage: 'ubuntu-16.04', nodeVersion: 12.x }
+  #       LinuxNode14: { vmImage: 'ubuntu-16.04', nodeVersion: 14.x }
+  #       WindowsNode12: { vmImage: 'windows-2019', nodeVersion: 12.x }
+  #       WindowsNode14: { vmImage: 'windows-2019', nodeVersion: 14.x }
+  #       MacNode12: { vmImage: 'macOS-10.15', nodeVersion: 12.x }
+  #       MacNode14: { vmImage: 'macOS-10.15', nodeVersion: 14.x }
 
   # ******************************************************************************
   # Old Node test suite

docusaurus/docs/advanced-configuration.md

@@ -15,7 +15,7 @@ You can adjust various development and production settings by setting environmen
 | PORT                      |   ✅ Used   | 🚫 Ignored | By default, the development web server will attempt to listen on port 3000 or prompt you to attempt the next available port. You may use this variable to specify a different port.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
 | HTTPS                     |   ✅ Used   | 🚫 Ignored | When set to `true`, Create React App will run the development server in `https` mode.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | WDS_SOCKET_HOST           |   ✅ Used   | 🚫 Ignored | When set, Create React App will run the development server with a custom websocket hostname for hot module reloading. Normally, `webpack-dev-server` defaults to `window.location.hostname` for the SockJS hostname. You may use this variable to start local development on more than one Create React App project at a time. See [webpack-dev-server documentation](https://webpack.js.org/configuration/dev-server/#devserversockhost) for more details.                                                                                                                                                                                                              |
-| WDS_SOCKET_PATH           |   ✅ Used   | 🚫 Ignored | When set, Create React App will run the development server with a custom websocket path for hot module reloading. Normally, `webpack-dev-server` defaults to `/sockjs-node` for the SockJS pathname. You may use this variable to start local development on more than one Create React App project at a time. See [webpack-dev-server documentation](https://webpack.js.org/configuration/dev-server/#devserversockpath) for more details.                                                                                                                                                                                                                              |
+| WDS_SOCKET_PATH           |   ✅ Used   | 🚫 Ignored | When set, Create React App will run the development server with a custom websocket path for hot module reloading. Normally, `webpack-dev-server` defaults to `/ws` for the SockJS pathname. You may use this variable to start local development on more than one Create React App project at a time. See [webpack-dev-server documentation](https://webpack.js.org/configuration/dev-server/#devserversockpath) for more details.                                                                                                                                                                                                                              |
 | WDS_SOCKET_PORT           |   ✅ Used   | 🚫 Ignored | When set, Create React App will run the development server with a custom websocket port for hot module reloading. Normally, `webpack-dev-server` defaults to `window.location.port` for the SockJS port. You may use this variable to start local development on more than one Create React App project at a time. See [webpack-dev-server documentation](https://webpack.js.org/configuration/dev-server/#devserversockport) for more details.                                                                                                                                                                                                                          |
 | PUBLIC_URL                |   ✅ Used   |  ✅ Used   | Create React App assumes your application is hosted at the serving web server's root or a subpath as specified in [`package.json` (`homepage`)](deployment#building-for-relative-paths). Normally, Create React App ignores the hostname. You may use this variable to force assets to be referenced verbatim to the url you provide (hostname included). This may be particularly useful when using a CDN to host your application.                                                                                                                                                                                                                                     |
 | BUILD_PATH                | 🚫 Ignored  |  ✅ Used   | By default, Create React App will output compiled assets to a `/build` directory adjacent to your `/src`. You may use this variable to specify a new path for Create React App to output assets. BUILD_PATH should be specified as a path relative to the root of your project.                                                                                                                                                                                                                                                                                                                                                                                          |

docusaurus/docs/using-the-public-folder.md

@@ -60,7 +60,7 @@ The `public` folder is useful as a workaround for a number of less common cases:
 
 - You need a file with a specific name in the build output, such as [`manifest.webmanifest`](https://developer.mozilla.org/en-US/docs/Web/Manifest).
 - You have thousands of images and need to dynamically reference their paths.
-- You want to include a small script like [`pace.js`](https://github.hubspot.com/pace/docs/welcome/) outside of the bundled code.
+- You want to include a small script like [`pace.js`](https://github.com/CodeByZach/pace) outside of the bundled code.
 - Some libraries may be incompatible with webpack and you have no other option but to include it as a `<script>` tag.
 
 Note that if you add a `<script>` that declares global variables, you should read the topic [Using Global Variables](using-global-variables.md) in the next section which explains how to reference them.

package.json

@@ -15,6 +15,7 @@
     "screencast": "node ./tasks/screencast.js",
     "screencast:error": "svg-term --cast jyu19xGl88FQ3poMY8Hbmfw8y --out screencast-error.svg --window --at 12000 --no-cursor",
     "alex": "alex .",
+    "test:integration": "jest test/integration",
     "test": "cd packages/react-scripts && node bin/react-scripts.js test",
     "format": "prettier --write 'packages/*/*.js' 'packages/*/!(node_modules)/**/*.js'",
     "compile:lockfile": "node tasks/compile-lockfile.js"

packages/babel-preset-react-app/create.js

@@ -146,12 +146,24 @@ module.exports = function (api, opts, env) {
       // class { handleClick = () => { } }
       // Enable loose mode to use assignment instead of defineProperty
       // See discussion in https://github.com/facebook/create-react-app/issues/4263
+      // Note:
+      // 'loose' mode configuration must be the same for
+      // * @babel/plugin-proposal-class-properties
+      // * @babel/plugin-proposal-private-methods
+      // * @babel/plugin-proposal-private-property-in-object
+      // (when they are enabled)
       [
         require('@babel/plugin-proposal-class-properties').default,
         {
           loose: true,
         },
       ],
+      [
+        require('@babel/plugin-proposal-private-methods').default,
+        {
+          loose: true,
+        },
+      ],
       // Adds Numeric Separators
       require('@babel/plugin-proposal-numeric-separator').default,
       // Polyfills the runtime needed for async/await, generators, and friends

packages/babel-preset-react-app/package.json

@@ -21,20 +21,21 @@
     "test.js"
   ],
   "dependencies": {
-    "@babel/core": "7.12.3",
-    "@babel/plugin-proposal-class-properties": "7.12.1",
-    "@babel/plugin-proposal-decorators": "7.12.1",
-    "@babel/plugin-proposal-nullish-coalescing-operator": "7.12.1",
-    "@babel/plugin-proposal-numeric-separator": "7.12.1",
-    "@babel/plugin-proposal-optional-chaining": "7.12.1",
-    "@babel/plugin-transform-flow-strip-types": "7.12.1",
-    "@babel/plugin-transform-react-display-name": "7.12.1",
-    "@babel/plugin-transform-runtime": "7.12.1",
-    "@babel/preset-env": "7.12.1",
-    "@babel/preset-react": "7.12.1",
-    "@babel/preset-typescript": "7.12.1",
-    "@babel/runtime": "7.12.1",
-    "babel-plugin-macros": "2.8.0",
+    "@babel/core": "7.14.6",
+    "@babel/plugin-proposal-class-properties": "7.14.5",
+    "@babel/plugin-proposal-decorators": "7.14.5",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "7.14.5",
+    "@babel/plugin-proposal-numeric-separator": "7.14.5",
+    "@babel/plugin-proposal-optional-chaining": "7.14.5",
+    "@babel/plugin-proposal-private-methods": "7.14.5",
+    "@babel/plugin-transform-flow-strip-types": "7.14.5",
+    "@babel/plugin-transform-react-display-name": "7.14.5",
+    "@babel/plugin-transform-runtime": "7.14.5",
+    "@babel/preset-env": "7.14.5",
+    "@babel/preset-react": "7.14.5",
+    "@babel/preset-typescript": "7.14.5",
+    "@babel/runtime": "7.14.5",
+    "babel-plugin-macros": "3.1.0",
     "babel-plugin-transform-react-remove-prop-types": "0.4.24"
   }
 }

packages/create-react-app/__tests__/getTemplateInstallPackage.test.js

@@ -21,9 +21,9 @@ describe('getTemplateInstallPackage', () => {
   });
 
   it('cra-template-typescript gives cra-template-typescript', async () => {
-    await expect(getTemplateInstallPackage('cra-template-typescript')).resolves.toBe(
-      'cra-template-typescript'
-    );
+    await expect(
+      getTemplateInstallPackage('cra-template-typescript')
+    ).resolves.toBe('cra-template-typescript');
   });
 
   it('typescript gives cra-template-typescript', async () => {
@@ -45,9 +45,9 @@ describe('getTemplateInstallPackage', () => {
   });
 
   it('cra-template-typescript@next gives cra-template-typescript@next', async () => {
-    await expect(getTemplateInstallPackage('cra-template-typescript@next')).resolves.toBe(
-      'cra-template-typescript@next'
-    );
+    await expect(
+      getTemplateInstallPackage('cra-template-typescript@next')
+    ).resolves.toBe('cra-template-typescript@next');
   });
 
   it('@iansu gives @iansu/cra-template', async () => {
@@ -69,9 +69,9 @@ describe('getTemplateInstallPackage', () => {
   });
 
   it('@iansu/cra-template-typescript@next gives @iansu/cra-template-typescript@next', async () => {
-    await expect(getTemplateInstallPackage('@iansu/cra-template-typescript@next')).resolves.toBe(
-      '@iansu/cra-template-typescript@next'
-    );
+    await expect(
+      getTemplateInstallPackage('@iansu/cra-template-typescript@next')
+    ).resolves.toBe('@iansu/cra-template-typescript@next');
   });
 
   it('http://example.com/cra-template.tar.gz gives http://example.com/cra-template.tar.gz', async () => {

packages/eslint-config-react-app/README.md

@@ -39,7 +39,7 @@ This config also ships with optional Jest rules for ESLint (based on [`eslint-pl
 You'll first need to add the ESLint plugin for Jest (if you don't already have it installed).
 
 ```sh
-npm install --save-dev eslint-plugin-jest@^24.0.0 eslint-plugin-testing-library&^3.9.0
+npm install --save-dev eslint-plugin-jest@^24.0.0 eslint-plugin-testing-library@^3.9.0
 ```
 
 You can then enable these rules by adding the Jest config to the `extends` array in your ESLint config.

packages/react-dev-utils/ModuleNotFoundPlugin.js

@@ -100,14 +100,7 @@ class ModuleNotFoundPlugin {
     const { prettierError } = this;
     compiler.hooks.make.intercept({
       register(tap) {
-        // "SingleEntryPlugin" can be removed when Webpack 4 no longer have to be supported
-        if (
-          !(
-            tap.name === 'MultiEntryPlugin' ||
-            tap.name === 'SingleEntryPlugin' ||
-            tap.name === 'EntryPlugin'
-          )
-        ) {
+        if (!(tap.name === 'MultiEntryPlugin' || tap.name === 'EntryPlugin')) {
           return tap;
         }
         return Object.assign({}, tap, {

packages/react-dev-utils/ModuleScopePlugin.js

@@ -15,6 +15,7 @@ class ModuleScopePlugin {
   constructor(appSrc, allowedFiles = []) {
     this.appSrcs = Array.isArray(appSrc) ? appSrc : [appSrc];
     this.allowedFiles = new Set(allowedFiles);
+    this.allowedPaths = [...allowedFiles].map(path.dirname).filter(p => path.relative(p, process.cwd()) !== '');
   }
 
   apply(resolver) {
@@ -53,6 +54,11 @@ class ModuleScopePlugin {
         if (this.allowedFiles.has(requestFullPath)) {
           return callback();
         }
+        if (this.allowedPaths.some((allowedFile) => {
+          return requestFullPath.startsWith(allowedFile);
+        })) {
+          return callback();
+        }
         // Find path from src to the requested file
         // Error if in a parent directory of all given appSrcs
         if (

packages/react-dev-utils/README.md

@@ -111,31 +111,6 @@ module.exports = {
 };
 ```
 
-#### `new WatchMissingNodeModulesPlugin(nodeModulesPath: string)`
-
-This webpack plugin ensures `npm install <library>` forces a project rebuild.<br>
-We’re not sure why this isn't webpack's default behavior.<br>
-See [#186](https://github.com/facebook/create-react-app/issues/186) for details.
-
-```js
-var path = require('path');
-var WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
-
-// webpack config
-module.exports = {
-  // ...
-  plugins: [
-    // ...
-    // If you require a missing module and then `npm install` it, you still have
-    // to restart the development server for webpack to discover it. This plugin
-    // makes the discovery automatic so you don't have to restart.
-    // See https://github.com/facebook/create-react-app/issues/186
-    new WatchMissingNodeModulesPlugin(path.resolve('node_modules')),
-  ],
-  // ...
-};
-```
-
 #### `checkRequiredFiles(files: Array<string>): boolean`
 
 Makes sure that all passed files exist.<br>
@@ -231,11 +206,11 @@ var formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');
 
 var compiler = webpack(config);
 
-compiler.hooks.invalid.tap('invalid', function() {
+compiler.hooks.invalid.tap('invalid', function () {
   console.log('Compiling...');
 });
 
-compiler.hooks.done.tap('done', function(stats) {
+compiler.hooks.done.tap('done', function (stats) {
   var rawMessages = stats.toJson({}, true);
   var messages = formatWebpackMessages(rawMessages);
   if (!messages.errors.length && !messages.warnings.length) {
@@ -338,11 +313,9 @@ The `args` object accepts a number of properties:
 
 - **appName** `string`: The name that will be printed to the terminal.
 - **config** `Object`: The webpack configuration options to be provided to the webpack constructor.
-- **devSocket** `Object`: Required if `useTypeScript` is `true`. This object should include `errors` and `warnings` which are functions accepting an array of errors or warnings emitted by the type checking. This is useful when running `fork-ts-checker-webpack-plugin` with `async: true` to report errors that are emitted after the webpack build is complete.
 - **urls** `Object`: To provide the `urls` argument, use `prepareUrls()` described below.
 - **useYarn** `boolean`: If `true`, yarn instructions will be emitted in the terminal instead of npm.
 - **useTypeScript** `boolean`: If `true`, TypeScript type checking will be enabled. Be sure to provide the `devSocket` argument above if this is set to `true`.
-- **tscCompileOnError** `boolean`: If `true`, errors in TypeScript type checking will not prevent start script from running app, and will not cause build script to exit unsuccessfully. Also downgrades all TypeScript type checking error messages to warning messages.
 - **webpack** `function`: A reference to the webpack constructor.
 
 ##### `prepareProxy(proxySetting: string, appPublicFolder: string, servedPathname: string): Object`