├── public
    ├── favicon.ico
    ├── manifest.json
    └── index.html
├── src
    ├── components
    │   └── Hello.js
    ├── App.test.js
    ├── index.css
    ├── App.css
    ├── App.js
    ├── index.js
    ├── logo.svg
    └── serviceWorker.js
├── config
    ├── jest
    │   ├── cssTransform.js
    │   └── fileTransform.js
    ├── paths.js
    ├── env.js
    ├── webpackDevServer.config.js
    └── webpack.config.js
├── .gitignore
├── scripts
    ├── test.js
    ├── start.js
    └── build.js
├── README.md
└── package.json


/public/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/TianchengLee/react-app-demo/master/public/favicon.ico


--------------------------------------------------------------------------------
/src/components/Hello.js:
--------------------------------------------------------------------------------
1 | import React from 'react'
2 | 
3 | export default function Hello () {
4 |   // React.createElement()
5 |   return <div>我是hello</div>
6 | }


--------------------------------------------------------------------------------
/src/App.test.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom';
 3 | import App from './App';
 4 | 
 5 | it('renders without crashing', () => {
 6 |   const div = document.createElement('div');
 7 |   ReactDOM.render(<App />, div);
 8 |   ReactDOM.unmountComponentAtNode(div);
 9 | });
10 | 


--------------------------------------------------------------------------------
/public/manifest.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "short_name": "React App",
 3 |   "name": "Create React App Sample",
 4 |   "icons": [
 5 |     {
 6 |       "src": "favicon.ico",
 7 |       "sizes": "64x64 32x32 24x24 16x16",
 8 |       "type": "image/x-icon"
 9 |     }
10 |   ],
11 |   "start_url": ".",
12 |   "display": "standalone",
13 |   "theme_color": "#000000",
14 |   "background_color": "#ffffff"
15 | }
16 | 


--------------------------------------------------------------------------------
/config/jest/cssTransform.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | // This is a custom Jest transformer turning style imports into empty objects.
 4 | // http://facebook.github.io/jest/docs/en/webpack.html
 5 | 
 6 | module.exports = {
 7 |   process() {
 8 |     return 'module.exports = {};';
 9 |   },
10 |   getCacheKey() {
11 |     // The output is always the same.
12 |     return 'cssTransform';
13 |   },
14 | };
15 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | /.pnp
 6 | .pnp.js
 7 | 
 8 | # testing
 9 | /coverage
10 | 
11 | # production
12 | /build
13 | 
14 | # misc
15 | .DS_Store
16 | .env.local
17 | .env.development.local
18 | .env.test.local
19 | .env.production.local
20 | 
21 | npm-debug.log*
22 | yarn-debug.log*
23 | yarn-error.log*
24 | 


--------------------------------------------------------------------------------
/src/index.css:
--------------------------------------------------------------------------------
 1 | body {
 2 |   margin: 0;
 3 |   padding: 0;
 4 |   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
 5 |     "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
 6 |     sans-serif;
 7 |   -webkit-font-smoothing: antialiased;
 8 |   -moz-osx-font-smoothing: grayscale;
 9 | }
10 | 
11 | code {
12 |   font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
13 |     monospace;
14 | }
15 | 


--------------------------------------------------------------------------------
/src/App.css:
--------------------------------------------------------------------------------
 1 | .App {
 2 |   text-align: center;
 3 | }
 4 | 
 5 | .App-logo {
 6 |   animation: App-logo-spin infinite 20s linear;
 7 |   height: 40vmin;
 8 |   pointer-events: none;
 9 | }
10 | 
11 | .App-header {
12 |   background-color: #282c34;
13 |   min-height: 100vh;
14 |   display: flex;
15 |   flex-direction: column;
16 |   align-items: center;
17 |   justify-content: center;
18 |   font-size: calc(10px + 2vmin);
19 |   color: white;
20 | }
21 | 
22 | .App-link {
23 |   color: #61dafb;
24 | }
25 | 
26 | @keyframes App-logo-spin {
27 |   from {
28 |     transform: rotate(0deg);
29 |   }
30 |   to {
31 |     transform: rotate(360deg);
32 |   }
33 | }
34 | 


--------------------------------------------------------------------------------
/src/App.js:
--------------------------------------------------------------------------------
 1 | import React, { Component } from 'react';
 2 | import logo from './logo.svg';
 3 | import './App.css';
 4 | 
 5 | class App extends Component {
 6 |   render() {
 7 |     return (
 8 |       <div className="App">
 9 |         <header className="App-header">
10 |           {/* <img src={logo} className="App-logo" alt="logo" /> */}
11 |           <p>
12 |             Edit <code>src/App.js</code> and save to reload.
13 |           </p>
14 |           <a
15 |             className="App-link"
16 |             href="https://reactjs.org"
17 |             target="_blank"
18 |             rel="noopener noreferrer"
19 |           >
20 |             Learn React
21 |           </a>
22 |         </header>
23 |       </div>
24 |     );
25 |   }
26 | }
27 | 
28 | export default App;
29 | 


--------------------------------------------------------------------------------
/config/jest/fileTransform.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | const path = require('path');
 4 | 
 5 | // This is a custom Jest transformer turning file imports into filenames.
 6 | // http://facebook.github.io/jest/docs/en/webpack.html
 7 | 
 8 | module.exports = {
 9 |   process(src, filename) {
10 |     const assetFilename = JSON.stringify(path.basename(filename));
11 | 
12 |     if (filename.match(/\.svg$/)) {
13 |       return `module.exports = {
14 |         __esModule: true,
15 |         default: ${assetFilename},
16 |         ReactComponent: (props) => ({
17 |           $$typeof: Symbol.for('react.element'),
18 |           type: 'svg',
19 |           ref: null,
20 |           key: null,
21 |           props: Object.assign({}, props, {
22 |             children: ${assetFilename}
23 |           })
24 |         }),
25 |       };`;
26 |     }
27 | 
28 |     return `module.exports = ${assetFilename};`;
29 |   },
30 | };
31 | 


--------------------------------------------------------------------------------
/src/index.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom';
 3 | import './index.css';
 4 | // import App from './App';
 5 | import * as serviceWorker from './serviceWorker';
 6 | 
 7 | import Hello from './components/Hello'
 8 | // let a = 10
 9 | // let arr = [
10 | //   <h1>xxx</h1>,
11 | //   <h2>xxx</h2>,
12 | // ]
13 | 
14 | let arr2 = [
15 |   '1',
16 |   '2',
17 |   '3',
18 | ]
19 | 
20 | let arr = [
21 |   '张三',
22 |   '李四',
23 |   '王五',
24 |   ...arr2
25 | ]
26 | 
27 | // arr = arr.concat(arr2)
28 | 
29 | // let arrTemp = []
30 | 
31 | // arr.forEach(item => {
32 | //   arrTemp.push(<li>{item}</li>)
33 | // })
34 | 
35 | // every some forEach
36 | // let arrTemp = arr.map(item => {
37 | //   return <li>{item}</li>
38 | // })
39 | // console.log(arrTemp)
40 | 
41 | // ReactDOM.render(<App />, document.getElementById('root'));
42 | ReactDOM.render(<div title="oo">
43 |   {/* <h1>我是h1---{a}</h1> */}
44 |   <hr />
45 |   <ul>
46 |     {arr.map(item => <li className="ppp" key={item}>{item}</li>)}
47 |   </ul>
48 |   <Hello></Hello>
49 | </div>, document.getElementById('root'));
50 | 
51 | // If you want your app to work offline and load faster, you can change
52 | // unregister() to register() below. Note this comes with some pitfalls.
53 | // Learn more about service workers: http://bit.ly/CRA-PWA
54 | serviceWorker.unregister();
55 | 


--------------------------------------------------------------------------------
/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8" />
 5 |     <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />
 6 |     <meta
 7 |       name="viewport"
 8 |       content="width=device-width, initial-scale=1, shrink-to-fit=no"
 9 |     />
10 |     <meta name="theme-color" content="#000000" />
11 |     <!--
12 |       manifest.json provides metadata used when your web app is installed on a
13 |       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
14 |     -->
15 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
16 |     <!--
17 |       Notice the use of %PUBLIC_URL% in the tags above.
18 |       It will be replaced with the URL of the `public` folder during the build.
19 |       Only files inside the `public` folder can be referenced from the HTML.
20 | 
21 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
22 |       work correctly both with client-side routing and a non-root public URL.
23 |       Learn how to configure a non-root public URL by running `npm run build`.
24 |     -->
25 |     <title>React App</title>
26 |   </head>
27 |   <body>
28 |     <noscript>You need to enable JavaScript to run this app.</noscript>
29 |     <div id="root"></div>
30 |     <!--
31 |       This HTML file is a template.
32 |       If you open it directly in the browser, you will see an empty page.
33 | 
34 |       You can add webfonts, meta tags, or analytics to this file.
35 |       The build step will place the bundled scripts into the <body> tag.
36 | 
37 |       To begin the development, run `npm start` or `yarn start`.
38 |       To create a production bundle, use `npm run build` or `yarn build`.
39 |     -->
40 |   </body>
41 | </html>
42 | 


--------------------------------------------------------------------------------
/scripts/test.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | // Do this as the first thing so that any code reading it knows the right env.
 4 | process.env.BABEL_ENV = 'test';
 5 | process.env.NODE_ENV = 'test';
 6 | process.env.PUBLIC_URL = '';
 7 | 
 8 | // Makes the script crash on unhandled rejections instead of silently
 9 | // ignoring them. In the future, promise rejections that are not handled will
10 | // terminate the Node.js process with a non-zero exit code.
11 | process.on('unhandledRejection', err => {
12 |   throw err;
13 | });
14 | 
15 | // Ensure environment variables are read.
16 | require('../config/env');
17 | 
18 | 
19 | const jest = require('jest');
20 | const execSync = require('child_process').execSync;
21 | let argv = process.argv.slice(2);
22 | 
23 | function isInGitRepository() {
24 |   try {
25 |     execSync('git rev-parse --is-inside-work-tree', { stdio: 'ignore' });
26 |     return true;
27 |   } catch (e) {
28 |     return false;
29 |   }
30 | }
31 | 
32 | function isInMercurialRepository() {
33 |   try {
34 |     execSync('hg --cwd . root', { stdio: 'ignore' });
35 |     return true;
36 |   } catch (e) {
37 |     return false;
38 |   }
39 | }
40 | 
41 | // Watch unless on CI, in coverage mode, explicitly adding `--no-watch`,
42 | // or explicitly running all tests
43 | if (
44 |   !process.env.CI &&
45 |   argv.indexOf('--coverage') === -1 &&
46 |   argv.indexOf('--no-watch') === -1 &&
47 |   argv.indexOf('--watchAll') === -1
48 | ) {
49 |   // https://github.com/facebook/create-react-app/issues/5210
50 |   const hasSourceControl = isInGitRepository() || isInMercurialRepository();
51 |   argv.push(hasSourceControl ? '--watch' : '--watchAll');
52 | }
53 | 
54 | // Jest doesn't have this option so we'll remove it
55 | if (argv.indexOf('--no-watch') !== -1) {
56 |   argv = argv.filter(arg => arg !== '--no-watch');
57 | }
58 | 
59 | 
60 | jest.run(argv);
61 | 


--------------------------------------------------------------------------------
/src/logo.svg:
--------------------------------------------------------------------------------
1 | <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3">
2 |     <g fill="#61DAFB">
3 |         <path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/>
4 |         <circle cx="420.9" cy="296.5" r="45.7"/>
5 |         <path d="M520.5 78.1z"/>
6 |     </g>
7 | </svg>
8 | 


--------------------------------------------------------------------------------
/config/paths.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | const path = require('path');
 4 | const fs = require('fs');
 5 | const url = require('url');
 6 | 
 7 | // Make sure any symlinks in the project folder are resolved:
 8 | // https://github.com/facebook/create-react-app/issues/637
 9 | const appDirectory = fs.realpathSync(process.cwd());
10 | const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
11 | 
12 | const envPublicUrl = process.env.PUBLIC_URL;
13 | 
14 | function ensureSlash(inputPath, needsSlash) {
15 |   const hasSlash = inputPath.endsWith('/');
16 |   if (hasSlash && !needsSlash) {
17 |     return inputPath.substr(0, inputPath.length - 1);
18 |   } else if (!hasSlash && needsSlash) {
19 |     return `${inputPath}/`;
20 |   } else {
21 |     return inputPath;
22 |   }
23 | }
24 | 
25 | const getPublicUrl = appPackageJson =>
26 |   envPublicUrl || require(appPackageJson).homepage;
27 | 
28 | // We use `PUBLIC_URL` environment variable or "homepage" field to infer
29 | // "public path" at which the app is served.
30 | // Webpack needs to know it to put the right <script> hrefs into HTML even in
31 | // single-page apps that may serve index.html for nested URLs like /todos/42.
32 | // We can't use a relative path in HTML because we don't want to load something
33 | // like /todos/42/static/js/bundle.7289d.js. We have to know the root.
34 | function getServedPath(appPackageJson) {
35 |   const publicUrl = getPublicUrl(appPackageJson);
36 |   const servedUrl =
37 |     envPublicUrl || (publicUrl ? url.parse(publicUrl).pathname : '/');
38 |   return ensureSlash(servedUrl, true);
39 | }
40 | 
41 | const moduleFileExtensions = [
42 |   'web.mjs',
43 |   'mjs',
44 |   'web.js',
45 |   'js',
46 |   'web.ts',
47 |   'ts',
48 |   'web.tsx',
49 |   'tsx',
50 |   'json',
51 |   'web.jsx',
52 |   'jsx',
53 | ];
54 | 
55 | // Resolve file paths in the same order as webpack
56 | const resolveModule = (resolveFn, filePath) => {
57 |   const extension = moduleFileExtensions.find(extension =>
58 |     fs.existsSync(resolveFn(`${filePath}.${extension}`))
59 |   );
60 | 
61 |   if (extension) {
62 |     return resolveFn(`${filePath}.${extension}`);
63 |   }
64 | 
65 |   return resolveFn(`${filePath}.js`);
66 | };
67 | 
68 | // config after eject: we're in ./config/
69 | module.exports = {
70 |   dotenv: resolveApp('.env'),
71 |   appPath: resolveApp('.'),
72 |   appBuild: resolveApp('build'),
73 |   appPublic: resolveApp('public'),
74 |   appHtml: resolveApp('public/index.html'),
75 |   appIndexJs: resolveModule(resolveApp, 'src/index'),
76 |   appPackageJson: resolveApp('package.json'),
77 |   appSrc: resolveApp('src'),
78 |   appTsConfig: resolveApp('tsconfig.json'),
79 |   yarnLockFile: resolveApp('yarn.lock'),
80 |   testsSetup: resolveModule(resolveApp, 'src/setupTests'),
81 |   proxySetup: resolveApp('src/setupProxy.js'),
82 |   appNodeModules: resolveApp('node_modules'),
83 |   publicUrl: getPublicUrl(resolveApp('package.json')),
84 |   servedPath: getServedPath(resolveApp('package.json')),
85 | };
86 | 
87 | 
88 | 
89 | module.exports.moduleFileExtensions = moduleFileExtensions;
90 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
 2 | 
 3 | ## Available Scripts
 4 | 
 5 | In the project directory, you can run:
 6 | 
 7 | ### `npm start`
 8 | 
 9 | Runs the app in the development mode.<br>
10 | Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
11 | 
12 | The page will reload if you make edits.<br>
13 | You will also see any lint errors in the console.
14 | 
15 | ### `npm test`
16 | 
17 | Launches the test runner in the interactive watch mode.<br>
18 | See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
19 | 
20 | ### `npm run build`
21 | 
22 | Builds the app for production to the `build` folder.<br>
23 | It correctly bundles React in production mode and optimizes the build for the best performance.
24 | 
25 | The build is minified and the filenames include the hashes.<br>
26 | Your app is ready to be deployed!
27 | 
28 | See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
29 | 
30 | ### `npm run eject`
31 | 
32 | **Note: this is a one-way operation. Once you `eject`, you can’t go back!**
33 | 
34 | If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
35 | 
36 | Instead, it will copy all the configuration files and the transitive dependencies (Webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
37 | 
38 | You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
39 | 
40 | ## Learn More
41 | 
42 | You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
43 | 
44 | To learn React, check out the [React documentation](https://reactjs.org/).
45 | 
46 | ### Code Splitting
47 | 
48 | This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting
49 | 
50 | ### Analyzing the Bundle Size
51 | 
52 | This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size
53 | 
54 | ### Making a Progressive Web App
55 | 
56 | This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app
57 | 
58 | ### Advanced Configuration
59 | 
60 | This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration
61 | 
62 | ### Deployment
63 | 
64 | This section has moved here: https://facebook.github.io/create-react-app/docs/deployment
65 | 
66 | ### `npm run build` fails to minify
67 | 
68 | This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify
69 | 


--------------------------------------------------------------------------------
/config/env.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | const fs = require('fs');
 4 | const path = require('path');
 5 | const paths = require('./paths');
 6 | 
 7 | // Make sure that including paths.js after env.js will read .env variables.
 8 | delete require.cache[require.resolve('./paths')];
 9 | 
10 | const NODE_ENV = process.env.NODE_ENV;
11 | if (!NODE_ENV) {
12 |   throw new Error(
13 |     'The NODE_ENV environment variable is required but was not specified.'
14 |   );
15 | }
16 | 
17 | // https://github.com/bkeepers/dotenv#what-other-env-files-can-i-use
18 | var dotenvFiles = [
19 |   `${paths.dotenv}.${NODE_ENV}.local`,
20 |   `${paths.dotenv}.${NODE_ENV}`,
21 |   // Don't include `.env.local` for `test` environment
22 |   // since normally you expect tests to produce the same
23 |   // results for everyone
24 |   NODE_ENV !== 'test' && `${paths.dotenv}.local`,
25 |   paths.dotenv,
26 | ].filter(Boolean);
27 | 
28 | // Load environment variables from .env* files. Suppress warnings using silent
29 | // if this file is missing. dotenv will never modify any environment variables
30 | // that have already been set.  Variable expansion is supported in .env files.
31 | // https://github.com/motdotla/dotenv
32 | // https://github.com/motdotla/dotenv-expand
33 | dotenvFiles.forEach(dotenvFile => {
34 |   if (fs.existsSync(dotenvFile)) {
35 |     require('dotenv-expand')(
36 |       require('dotenv').config({
37 |         path: dotenvFile,
38 |       })
39 |     );
40 |   }
41 | });
42 | 
43 | // We support resolving modules according to `NODE_PATH`.
44 | // This lets you use absolute paths in imports inside large monorepos:
45 | // https://github.com/facebook/create-react-app/issues/253.
46 | // It works similar to `NODE_PATH` in Node itself:
47 | // https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders
48 | // Note that unlike in Node, only *relative* paths from `NODE_PATH` are honored.
49 | // Otherwise, we risk importing Node.js core modules into an app instead of Webpack shims.
50 | // https://github.com/facebook/create-react-app/issues/1023#issuecomment-265344421
51 | // We also resolve them to make sure all tools using them work consistently.
52 | const appDirectory = fs.realpathSync(process.cwd());
53 | process.env.NODE_PATH = (process.env.NODE_PATH || '')
54 |   .split(path.delimiter)
55 |   .filter(folder => folder && !path.isAbsolute(folder))
56 |   .map(folder => path.resolve(appDirectory, folder))
57 |   .join(path.delimiter);
58 | 
59 | // Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
60 | // injected into the application via DefinePlugin in Webpack configuration.
61 | const REACT_APP = /^REACT_APP_/i;
62 | 
63 | function getClientEnvironment(publicUrl) {
64 |   const raw = Object.keys(process.env)
65 |     .filter(key => REACT_APP.test(key))
66 |     .reduce(
67 |       (env, key) => {
68 |         env[key] = process.env[key];
69 |         return env;
70 |       },
71 |       {
72 |         // Useful for determining whether we’re running in production mode.
73 |         // Most importantly, it switches React into the correct mode.
74 |         NODE_ENV: process.env.NODE_ENV || 'development',
75 |         // Useful for resolving the correct path to static assets in `public`.
76 |         // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
77 |         // This should only be used as an escape hatch. Normally you would put
78 |         // images into the `src` and `import` them in code to get their paths.
79 |         PUBLIC_URL: publicUrl,
80 |       }
81 |     );
82 |   // Stringify all values so we can feed into Webpack DefinePlugin
83 |   const stringified = {
84 |     'process.env': Object.keys(raw).reduce((env, key) => {
85 |       env[key] = JSON.stringify(raw[key]);
86 |       return env;
87 |     }, {}),
88 |   };
89 | 
90 |   return { raw, stringified };
91 | }
92 | 
93 | module.exports = getClientEnvironment;
94 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "name": "react-app-demo",
  3 |   "version": "0.1.0",
  4 |   "private": true,
  5 |   "dependencies": {
  6 |     "@babel/core": "7.2.2",
  7 |     "@svgr/webpack": "4.1.0",
  8 |     "babel-core": "7.0.0-bridge.0",
  9 |     "babel-eslint": "9.0.0",
 10 |     "babel-jest": "23.6.0",
 11 |     "babel-loader": "8.0.5",
 12 |     "babel-plugin-named-asset-import": "^0.3.1",
 13 |     "babel-preset-react-app": "^7.0.1",
 14 |     "bfj": "6.1.1",
 15 |     "case-sensitive-paths-webpack-plugin": "2.2.0",
 16 |     "css-loader": "1.0.0",
 17 |     "dotenv": "6.0.0",
 18 |     "dotenv-expand": "4.2.0",
 19 |     "eslint": "5.12.0",
 20 |     "eslint-config-react-app": "^3.0.7",
 21 |     "eslint-loader": "2.1.1",
 22 |     "eslint-plugin-flowtype": "2.50.1",
 23 |     "eslint-plugin-import": "2.14.0",
 24 |     "eslint-plugin-jsx-a11y": "6.1.2",
 25 |     "eslint-plugin-react": "7.12.4",
 26 |     "file-loader": "2.0.0",
 27 |     "fork-ts-checker-webpack-plugin-alt": "0.4.14",
 28 |     "fs-extra": "7.0.1",
 29 |     "html-webpack-plugin": "4.0.0-alpha.2",
 30 |     "identity-obj-proxy": "3.0.0",
 31 |     "jest": "23.6.0",
 32 |     "jest-pnp-resolver": "1.0.2",
 33 |     "jest-resolve": "23.6.0",
 34 |     "jest-watch-typeahead": "^0.2.1",
 35 |     "mini-css-extract-plugin": "0.5.0",
 36 |     "optimize-css-assets-webpack-plugin": "5.0.1",
 37 |     "pnp-webpack-plugin": "1.2.1",
 38 |     "postcss-flexbugs-fixes": "4.1.0",
 39 |     "postcss-loader": "3.0.0",
 40 |     "postcss-preset-env": "6.5.0",
 41 |     "postcss-safe-parser": "4.0.1",
 42 |     "react": "^16.8.3",
 43 |     "react-app-polyfill": "^0.2.1",
 44 |     "react-dev-utils": "^7.0.3",
 45 |     "react-dom": "^16.8.3",
 46 |     "resolve": "1.10.0",
 47 |     "sass-loader": "7.1.0",
 48 |     "style-loader": "0.23.1",
 49 |     "terser-webpack-plugin": "1.2.2",
 50 |     "url-loader": "1.1.2",
 51 |     "webpack": "4.28.3",
 52 |     "webpack-dev-server": "3.1.14",
 53 |     "webpack-manifest-plugin": "2.0.4",
 54 |     "workbox-webpack-plugin": "3.6.3"
 55 |   },
 56 |   "scripts": {
 57 |     "start": "node scripts/start.js",
 58 |     "build": "node scripts/build.js",
 59 |     "test": "node scripts/test.js"
 60 |   },
 61 |   "eslintConfig": {
 62 |     "extends": "react-app"
 63 |   },
 64 |   "browserslist": [
 65 |     ">0.2%",
 66 |     "not dead",
 67 |     "not ie <= 11",
 68 |     "not op_mini all"
 69 |   ],
 70 |   "jest": {
 71 |     "collectCoverageFrom": [
 72 |       "src/**/*.{js,jsx,ts,tsx}",
 73 |       "!src/**/*.d.ts"
 74 |     ],
 75 |     "resolver": "jest-pnp-resolver",
 76 |     "setupFiles": [
 77 |       "react-app-polyfill/jsdom"
 78 |     ],
 79 |     "testMatch": [
 80 |       "<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}",
 81 |       "<rootDir>/src/**/?(*.)(spec|test).{js,jsx,ts,tsx}"
 82 |     ],
 83 |     "testEnvironment": "jsdom",
 84 |     "testURL": "http://localhost",
 85 |     "transform": {
 86 |       "^.+\\.(js|jsx|ts|tsx)$": "<rootDir>/node_modules/babel-jest",
 87 |       "^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
 88 |       "^(?!.*\\.(js|jsx|ts|tsx|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
 89 |     },
 90 |     "transformIgnorePatterns": [
 91 |       "[/\\\\]node_modules[/\\\\].+\\.(js|jsx|ts|tsx)$",
 92 |       "^.+\\.module\\.(css|sass|scss)$"
 93 |     ],
 94 |     "moduleNameMapper": {
 95 |       "^react-native$": "react-native-web",
 96 |       "^.+\\.module\\.(css|sass|scss)$": "identity-obj-proxy"
 97 |     },
 98 |     "moduleFileExtensions": [
 99 |       "web.js",
100 |       "js",
101 |       "web.ts",
102 |       "ts",
103 |       "web.tsx",
104 |       "tsx",
105 |       "json",
106 |       "web.jsx",
107 |       "jsx",
108 |       "node"
109 |     ],
110 |     "watchPlugins": [
111 |       "C:\\Users\\LTC\\Desktop\\23期\\react-study-road23\\react-app-demo\\node_modules\\jest-watch-typeahead\\filename.js",
112 |       "C:\\Users\\LTC\\Desktop\\23期\\react-study-road23\\react-app-demo\\node_modules\\jest-watch-typeahead\\testname.js"
113 |     ]
114 |   },
115 |   "babel": {
116 |     "presets": [
117 |       "react-app"
118 |     ]
119 |   }
120 | }
121 | 


--------------------------------------------------------------------------------
/scripts/start.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | // Do this as the first thing so that any code reading it knows the right env.
  4 | process.env.BABEL_ENV = 'development';
  5 | process.env.NODE_ENV = 'development';
  6 | 
  7 | // Makes the script crash on unhandled rejections instead of silently
  8 | // ignoring them. In the future, promise rejections that are not handled will
  9 | // terminate the Node.js process with a non-zero exit code.
 10 | process.on('unhandledRejection', err => {
 11 |   throw err;
 12 | });
 13 | 
 14 | // Ensure environment variables are read.
 15 | require('../config/env');
 16 | 
 17 | 
 18 | const fs = require('fs');
 19 | const chalk = require('react-dev-utils/chalk');
 20 | const webpack = require('webpack');
 21 | const WebpackDevServer = require('webpack-dev-server');
 22 | const clearConsole = require('react-dev-utils/clearConsole');
 23 | const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
 24 | const {
 25 |   choosePort,
 26 |   createCompiler,
 27 |   prepareProxy,
 28 |   prepareUrls,
 29 | } = require('react-dev-utils/WebpackDevServerUtils');
 30 | const openBrowser = require('react-dev-utils/openBrowser');
 31 | const paths = require('../config/paths');
 32 | const configFactory = require('../config/webpack.config');
 33 | const createDevServerConfig = require('../config/webpackDevServer.config');
 34 | 
 35 | const useYarn = fs.existsSync(paths.yarnLockFile);
 36 | const isInteractive = process.stdout.isTTY;
 37 | 
 38 | // Warn and crash if required files are missing
 39 | if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
 40 |   process.exit(1);
 41 | }
 42 | 
 43 | // Tools like Cloud9 rely on this.
 44 | const DEFAULT_PORT = parseInt(process.env.PORT, 10) || 3000;
 45 | const HOST = process.env.HOST || '0.0.0.0';
 46 | 
 47 | if (process.env.HOST) {
 48 |   console.log(
 49 |     chalk.cyan(
 50 |       `Attempting to bind to HOST environment variable: ${chalk.yellow(
 51 |         chalk.bold(process.env.HOST)
 52 |       )}`
 53 |     )
 54 |   );
 55 |   console.log(
 56 |     `If this was unintentional, check that you haven't mistakenly set it in your shell.`
 57 |   );
 58 |   console.log(
 59 |     `Learn more here: ${chalk.yellow('http://bit.ly/CRA-advanced-config')}`
 60 |   );
 61 |   console.log();
 62 | }
 63 | 
 64 | // We require that you explictly set browsers and do not fall back to
 65 | // browserslist defaults.
 66 | const { checkBrowsers } = require('react-dev-utils/browsersHelper');
 67 | checkBrowsers(paths.appPath, isInteractive)
 68 |   .then(() => {
 69 |     // We attempt to use the default port but if it is busy, we offer the user to
 70 |     // run on a different port. `choosePort()` Promise resolves to the next free port.
 71 |     return choosePort(HOST, DEFAULT_PORT);
 72 |   })
 73 |   .then(port => {
 74 |     if (port == null) {
 75 |       // We have not found a port.
 76 |       return;
 77 |     }
 78 |     const config = configFactory('development');
 79 |     const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
 80 |     const appName = require(paths.appPackageJson).name;
 81 |     const urls = prepareUrls(protocol, HOST, port);
 82 |     // Create a webpack compiler that is configured with custom messages.
 83 |     const compiler = createCompiler(webpack, config, appName, urls, useYarn);
 84 |     // Load proxy config
 85 |     const proxySetting = require(paths.appPackageJson).proxy;
 86 |     const proxyConfig = prepareProxy(proxySetting, paths.appPublic);
 87 |     // Serve webpack assets generated by the compiler over a web server.
 88 |     const serverConfig = createDevServerConfig(
 89 |       proxyConfig,
 90 |       urls.lanUrlForConfig
 91 |     );
 92 |     const devServer = new WebpackDevServer(compiler, serverConfig);
 93 |     // Launch WebpackDevServer.
 94 |     devServer.listen(port, HOST, err => {
 95 |       if (err) {
 96 |         return console.log(err);
 97 |       }
 98 |       if (isInteractive) {
 99 |         clearConsole();
100 |       }
101 |       console.log(chalk.cyan('Starting the development server...\n'));
102 |       openBrowser(urls.localUrlForBrowser);
103 |     });
104 | 
105 |     ['SIGINT', 'SIGTERM'].forEach(function(sig) {
106 |       process.on(sig, function() {
107 |         devServer.close();
108 |         process.exit();
109 |       });
110 |     });
111 |   })
112 |   .catch(err => {
113 |     if (err && err.message) {
114 |       console.log(err.message);
115 |     }
116 |     process.exit(1);
117 |   });
118 | 


--------------------------------------------------------------------------------
/src/serviceWorker.js:
--------------------------------------------------------------------------------
  1 | // This optional code is used to register a service worker.
  2 | // register() is not called by default.
  3 | 
  4 | // This lets the app load faster on subsequent visits in production, and gives
  5 | // it offline capabilities. However, it also means that developers (and users)
  6 | // will only see deployed updates on subsequent visits to a page, after all the
  7 | // existing tabs open on the page have been closed, since previously cached
  8 | // resources are updated in the background.
  9 | 
 10 | // To learn more about the benefits of this model and instructions on how to
 11 | // opt-in, read http://bit.ly/CRA-PWA
 12 | 
 13 | const isLocalhost = Boolean(
 14 |   window.location.hostname === 'localhost' ||
 15 |     // [::1] is the IPv6 localhost address.
 16 |     window.location.hostname === '[::1]' ||
 17 |     // 127.0.0.1/8 is considered localhost for IPv4.
 18 |     window.location.hostname.match(
 19 |       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
 20 |     )
 21 | );
 22 | 
 23 | export function register(config) {
 24 |   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
 25 |     // The URL constructor is available in all browsers that support SW.
 26 |     const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
 27 |     if (publicUrl.origin !== window.location.origin) {
 28 |       // Our service worker won't work if PUBLIC_URL is on a different origin
 29 |       // from what our page is served on. This might happen if a CDN is used to
 30 |       // serve assets; see https://github.com/facebook/create-react-app/issues/2374
 31 |       return;
 32 |     }
 33 | 
 34 |     window.addEventListener('load', () => {
 35 |       const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
 36 | 
 37 |       if (isLocalhost) {
 38 |         // This is running on localhost. Let's check if a service worker still exists or not.
 39 |         checkValidServiceWorker(swUrl, config);
 40 | 
 41 |         // Add some additional logging to localhost, pointing developers to the
 42 |         // service worker/PWA documentation.
 43 |         navigator.serviceWorker.ready.then(() => {
 44 |           console.log(
 45 |             'This web app is being served cache-first by a service ' +
 46 |               'worker. To learn more, visit http://bit.ly/CRA-PWA'
 47 |           );
 48 |         });
 49 |       } else {
 50 |         // Is not localhost. Just register service worker
 51 |         registerValidSW(swUrl, config);
 52 |       }
 53 |     });
 54 |   }
 55 | }
 56 | 
 57 | function registerValidSW(swUrl, config) {
 58 |   navigator.serviceWorker
 59 |     .register(swUrl)
 60 |     .then(registration => {
 61 |       registration.onupdatefound = () => {
 62 |         const installingWorker = registration.installing;
 63 |         if (installingWorker == null) {
 64 |           return;
 65 |         }
 66 |         installingWorker.onstatechange = () => {
 67 |           if (installingWorker.state === 'installed') {
 68 |             if (navigator.serviceWorker.controller) {
 69 |               // At this point, the updated precached content has been fetched,
 70 |               // but the previous service worker will still serve the older
 71 |               // content until all client tabs are closed.
 72 |               console.log(
 73 |                 'New content is available and will be used when all ' +
 74 |                   'tabs for this page are closed. See http://bit.ly/CRA-PWA.'
 75 |               );
 76 | 
 77 |               // Execute callback
 78 |               if (config && config.onUpdate) {
 79 |                 config.onUpdate(registration);
 80 |               }
 81 |             } else {
 82 |               // At this point, everything has been precached.
 83 |               // It's the perfect time to display a
 84 |               // "Content is cached for offline use." message.
 85 |               console.log('Content is cached for offline use.');
 86 | 
 87 |               // Execute callback
 88 |               if (config && config.onSuccess) {
 89 |                 config.onSuccess(registration);
 90 |               }
 91 |             }
 92 |           }
 93 |         };
 94 |       };
 95 |     })
 96 |     .catch(error => {
 97 |       console.error('Error during service worker registration:', error);
 98 |     });
 99 | }
100 | 
101 | function checkValidServiceWorker(swUrl, config) {
102 |   // Check if the service worker can be found. If it can't reload the page.
103 |   fetch(swUrl)
104 |     .then(response => {
105 |       // Ensure service worker exists, and that we really are getting a JS file.
106 |       const contentType = response.headers.get('content-type');
107 |       if (
108 |         response.status === 404 ||
109 |         (contentType != null && contentType.indexOf('javascript') === -1)
110 |       ) {
111 |         // No service worker found. Probably a different app. Reload the page.
112 |         navigator.serviceWorker.ready.then(registration => {
113 |           registration.unregister().then(() => {
114 |             window.location.reload();
115 |           });
116 |         });
117 |       } else {
118 |         // Service worker found. Proceed as normal.
119 |         registerValidSW(swUrl, config);
120 |       }
121 |     })
122 |     .catch(() => {
123 |       console.log(
124 |         'No internet connection found. App is running in offline mode.'
125 |       );
126 |     });
127 | }
128 | 
129 | export function unregister() {
130 |   if ('serviceWorker' in navigator) {
131 |     navigator.serviceWorker.ready.then(registration => {
132 |       registration.unregister();
133 |     });
134 |   }
135 | }
136 | 


--------------------------------------------------------------------------------
/config/webpackDevServer.config.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | const errorOverlayMiddleware = require('react-dev-utils/errorOverlayMiddleware');
  4 | const evalSourceMapMiddleware = require('react-dev-utils/evalSourceMapMiddleware');
  5 | const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
  6 | const ignoredFiles = require('react-dev-utils/ignoredFiles');
  7 | const paths = require('./paths');
  8 | const fs = require('fs');
  9 | 
 10 | const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
 11 | const host = process.env.HOST || '0.0.0.0';
 12 | 
 13 | module.exports = function(proxy, allowedHost) {
 14 |   return {
 15 |     // WebpackDevServer 2.4.3 introduced a security fix that prevents remote
 16 |     // websites from potentially accessing local content through DNS rebinding:
 17 |     // https://github.com/webpack/webpack-dev-server/issues/887
 18 |     // https://medium.com/webpack/webpack-dev-server-middleware-security-issues-1489d950874a
 19 |     // However, it made several existing use cases such as development in cloud
 20 |     // environment or subdomains in development significantly more complicated:
 21 |     // https://github.com/facebook/create-react-app/issues/2271
 22 |     // https://github.com/facebook/create-react-app/issues/2233
 23 |     // While we're investigating better solutions, for now we will take a
 24 |     // compromise. Since our WDS configuration only serves files in the `public`
 25 |     // folder we won't consider accessing them a vulnerability. However, if you
 26 |     // use the `proxy` feature, it gets more dangerous because it can expose
 27 |     // remote code execution vulnerabilities in backends like Django and Rails.
 28 |     // So we will disable the host check normally, but enable it if you have
 29 |     // specified the `proxy` setting. Finally, we let you override it if you
 30 |     // really know what you're doing with a special environment variable.
 31 |     disableHostCheck:
 32 |       !proxy || process.env.DANGEROUSLY_DISABLE_HOST_CHECK === 'true',
 33 |     // Enable gzip compression of generated files.
 34 |     compress: true,
 35 |     // Silence WebpackDevServer's own logs since they're generally not useful.
 36 |     // It will still show compile warnings and errors with this setting.
 37 |     clientLogLevel: 'none',
 38 |     // By default WebpackDevServer serves physical files from current directory
 39 |     // in addition to all the virtual build products that it serves from memory.
 40 |     // This is confusing because those files won’t automatically be available in
 41 |     // production build folder unless we copy them. However, copying the whole
 42 |     // project directory is dangerous because we may expose sensitive files.
 43 |     // Instead, we establish a convention that only files in `public` directory
 44 |     // get served. Our build script will copy `public` into the `build` folder.
 45 |     // In `index.html`, you can get URL of `public` folder with %PUBLIC_URL%:
 46 |     // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
 47 |     // In JavaScript code, you can access it with `process.env.PUBLIC_URL`.
 48 |     // Note that we only recommend to use `public` folder as an escape hatch
 49 |     // for files like `favicon.ico`, `manifest.json`, and libraries that are
 50 |     // for some reason broken when imported through Webpack. If you just want to
 51 |     // use an image, put it in `src` and `import` it from JavaScript instead.
 52 |     contentBase: paths.appPublic,
 53 |     // By default files from `contentBase` will not trigger a page reload.
 54 |     watchContentBase: true,
 55 |     // Enable hot reloading server. It will provide /sockjs-node/ endpoint
 56 |     // for the WebpackDevServer client so it can learn when the files were
 57 |     // updated. The WebpackDevServer client is included as an entry point
 58 |     // in the Webpack development configuration. Note that only changes
 59 |     // to CSS are currently hot reloaded. JS changes will refresh the browser.
 60 |     hot: true,
 61 |     // It is important to tell WebpackDevServer to use the same "root" path
 62 |     // as we specified in the config. In development, we always serve from /.
 63 |     publicPath: '/',
 64 |     // WebpackDevServer is noisy by default so we emit custom message instead
 65 |     // by listening to the compiler events with `compiler.hooks[...].tap` calls above.
 66 |     quiet: true,
 67 |     // Reportedly, this avoids CPU overload on some systems.
 68 |     // https://github.com/facebook/create-react-app/issues/293
 69 |     // src/node_modules is not ignored to support absolute imports
 70 |     // https://github.com/facebook/create-react-app/issues/1065
 71 |     watchOptions: {
 72 |       ignored: ignoredFiles(paths.appSrc),
 73 |     },
 74 |     // Enable HTTPS if the HTTPS environment variable is set to 'true'
 75 |     https: protocol === 'https',
 76 |     host,
 77 |     overlay: false,
 78 |     historyApiFallback: {
 79 |       // Paths with dots should still use the history fallback.
 80 |       // See https://github.com/facebook/create-react-app/issues/387.
 81 |       disableDotRule: true,
 82 |     },
 83 |     public: allowedHost,
 84 |     proxy,
 85 |     before(app, server) {
 86 |       if (fs.existsSync(paths.proxySetup)) {
 87 |         // This registers user provided middleware for proxy reasons
 88 |         require(paths.proxySetup)(app);
 89 |       }
 90 | 
 91 |       // This lets us fetch source contents from webpack for the error overlay
 92 |       app.use(evalSourceMapMiddleware(server));
 93 |       // This lets us open files from the runtime error overlay.
 94 |       app.use(errorOverlayMiddleware());
 95 | 
 96 |       // This service worker file is effectively a 'no-op' that will reset any
 97 |       // previous service worker registered for the same host:port combination.
 98 |       // We do this in development to avoid hitting the production cache if
 99 |       // it used the same host and port.
100 |       // https://github.com/facebook/create-react-app/issues/2272#issuecomment-302832432
101 |       app.use(noopServiceWorkerMiddleware());
102 |     },
103 |   };
104 | };
105 | 


--------------------------------------------------------------------------------
/scripts/build.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | // Do this as the first thing so that any code reading it knows the right env.
  4 | process.env.BABEL_ENV = 'production';
  5 | process.env.NODE_ENV = 'production';
  6 | 
  7 | // Makes the script crash on unhandled rejections instead of silently
  8 | // ignoring them. In the future, promise rejections that are not handled will
  9 | // terminate the Node.js process with a non-zero exit code.
 10 | process.on('unhandledRejection', err => {
 11 |   throw err;
 12 | });
 13 | 
 14 | // Ensure environment variables are read.
 15 | require('../config/env');
 16 | 
 17 | 
 18 | const path = require('path');
 19 | const chalk = require('react-dev-utils/chalk');
 20 | const fs = require('fs-extra');
 21 | const webpack = require('webpack');
 22 | const bfj = require('bfj');
 23 | const configFactory = require('../config/webpack.config');
 24 | const paths = require('../config/paths');
 25 | const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
 26 | const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');
 27 | const printHostingInstructions = require('react-dev-utils/printHostingInstructions');
 28 | const FileSizeReporter = require('react-dev-utils/FileSizeReporter');
 29 | const printBuildError = require('react-dev-utils/printBuildError');
 30 | 
 31 | const measureFileSizesBeforeBuild =
 32 |   FileSizeReporter.measureFileSizesBeforeBuild;
 33 | const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild;
 34 | const useYarn = fs.existsSync(paths.yarnLockFile);
 35 | 
 36 | // These sizes are pretty large. We'll warn for bundles exceeding them.
 37 | const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024;
 38 | const WARN_AFTER_CHUNK_GZIP_SIZE = 1024 * 1024;
 39 | 
 40 | const isInteractive = process.stdout.isTTY;
 41 | 
 42 | // Warn and crash if required files are missing
 43 | if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
 44 |   process.exit(1);
 45 | }
 46 | 
 47 | // Process CLI arguments
 48 | const argv = process.argv.slice(2);
 49 | const writeStatsJson = argv.indexOf('--stats') !== -1;
 50 | 
 51 | // Generate configuration
 52 | const config = configFactory('production');
 53 | 
 54 | // We require that you explicitly set browsers and do not fall back to
 55 | // browserslist defaults.
 56 | const { checkBrowsers } = require('react-dev-utils/browsersHelper');
 57 | checkBrowsers(paths.appPath, isInteractive)
 58 |   .then(() => {
 59 |     // First, read the current file sizes in build directory.
 60 |     // This lets us display how much they changed later.
 61 |     return measureFileSizesBeforeBuild(paths.appBuild);
 62 |   })
 63 |   .then(previousFileSizes => {
 64 |     // Remove all content but keep the directory so that
 65 |     // if you're in it, you don't end up in Trash
 66 |     fs.emptyDirSync(paths.appBuild);
 67 |     // Merge with the public folder
 68 |     copyPublicFolder();
 69 |     // Start the webpack build
 70 |     return build(previousFileSizes);
 71 |   })
 72 |   .then(
 73 |     ({ stats, previousFileSizes, warnings }) => {
 74 |       if (warnings.length) {
 75 |         console.log(chalk.yellow('Compiled with warnings.\n'));
 76 |         console.log(warnings.join('\n\n'));
 77 |         console.log(
 78 |           '\nSearch for the ' +
 79 |             chalk.underline(chalk.yellow('keywords')) +
 80 |             ' to learn more about each warning.'
 81 |         );
 82 |         console.log(
 83 |           'To ignore, add ' +
 84 |             chalk.cyan('// eslint-disable-next-line') +
 85 |             ' to the line before.\n'
 86 |         );
 87 |       } else {
 88 |         console.log(chalk.green('Compiled successfully.\n'));
 89 |       }
 90 | 
 91 |       console.log('File sizes after gzip:\n');
 92 |       printFileSizesAfterBuild(
 93 |         stats,
 94 |         previousFileSizes,
 95 |         paths.appBuild,
 96 |         WARN_AFTER_BUNDLE_GZIP_SIZE,
 97 |         WARN_AFTER_CHUNK_GZIP_SIZE
 98 |       );
 99 |       console.log();
100 | 
101 |       const appPackage = require(paths.appPackageJson);
102 |       const publicUrl = paths.publicUrl;
103 |       const publicPath = config.output.publicPath;
104 |       const buildFolder = path.relative(process.cwd(), paths.appBuild);
105 |       printHostingInstructions(
106 |         appPackage,
107 |         publicUrl,
108 |         publicPath,
109 |         buildFolder,
110 |         useYarn
111 |       );
112 |     },
113 |     err => {
114 |       console.log(chalk.red('Failed to compile.\n'));
115 |       printBuildError(err);
116 |       process.exit(1);
117 |     }
118 |   )
119 |   .catch(err => {
120 |     if (err && err.message) {
121 |       console.log(err.message);
122 |     }
123 |     process.exit(1);
124 |   });
125 | 
126 | // Create the production build and print the deployment instructions.
127 | function build(previousFileSizes) {
128 |   console.log('Creating an optimized production build...');
129 | 
130 |   let compiler = webpack(config);
131 |   return new Promise((resolve, reject) => {
132 |     compiler.run((err, stats) => {
133 |       let messages;
134 |       if (err) {
135 |         if (!err.message) {
136 |           return reject(err);
137 |         }
138 |         messages = formatWebpackMessages({
139 |           errors: [err.message],
140 |           warnings: [],
141 |         });
142 |       } else {
143 |         messages = formatWebpackMessages(
144 |           stats.toJson({ all: false, warnings: true, errors: true })
145 |         );
146 |       }
147 |       if (messages.errors.length) {
148 |         // Only keep the first error. Others are often indicative
149 |         // of the same problem, but confuse the reader with noise.
150 |         if (messages.errors.length > 1) {
151 |           messages.errors.length = 1;
152 |         }
153 |         return reject(new Error(messages.errors.join('\n\n')));
154 |       }
155 |       if (
156 |         process.env.CI &&
157 |         (typeof process.env.CI !== 'string' ||
158 |           process.env.CI.toLowerCase() !== 'false') &&
159 |         messages.warnings.length
160 |       ) {
161 |         console.log(
162 |           chalk.yellow(
163 |             '\nTreating warnings as errors because process.env.CI = true.\n' +
164 |               'Most CI servers set it automatically.\n'
165 |           )
166 |         );
167 |         return reject(new Error(messages.warnings.join('\n\n')));
168 |       }
169 | 
170 |       const resolveArgs = {
171 |         stats,
172 |         previousFileSizes,
173 |         warnings: messages.warnings,
174 |       };
175 |       if (writeStatsJson) {
176 |         return bfj
177 |           .write(paths.appBuild + '/bundle-stats.json', stats.toJson())
178 |           .then(() => resolve(resolveArgs))
179 |           .catch(error => reject(new Error(error)));
180 |       }
181 | 
182 |       return resolve(resolveArgs);
183 |     });
184 |   });
185 | }
186 | 
187 | function copyPublicFolder() {
188 |   fs.copySync(paths.appPublic, paths.appBuild, {
189 |     dereference: true,
190 |     filter: file => file !== paths.appHtml,
191 |   });
192 | }
193 | 


--------------------------------------------------------------------------------
/config/webpack.config.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | const fs = require('fs');
  4 | const path = require('path');
  5 | const webpack = require('webpack');
  6 | const resolve = require('resolve');
  7 | const PnpWebpackPlugin = require('pnp-webpack-plugin');
  8 | const HtmlWebpackPlugin = require('html-webpack-plugin');
  9 | const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
 10 | const InlineChunkHtmlPlugin = require('react-dev-utils/InlineChunkHtmlPlugin');
 11 | const TerserPlugin = require('terser-webpack-plugin');
 12 | const MiniCssExtractPlugin = require('mini-css-extract-plugin');
 13 | const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
 14 | const safePostCssParser = require('postcss-safe-parser');
 15 | const ManifestPlugin = require('webpack-manifest-plugin');
 16 | const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
 17 | const WorkboxWebpackPlugin = require('workbox-webpack-plugin');
 18 | const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
 19 | const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
 20 | const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
 21 | const paths = require('./paths');
 22 | const getClientEnvironment = require('./env');
 23 | const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
 24 | const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin-alt');
 25 | const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
 26 | 
 27 | 
 28 | // Source maps are resource heavy and can cause out of memory issue for large source files.
 29 | const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
 30 | // Some apps do not need the benefits of saving a web request, so not inlining the chunk
 31 | // makes for a smoother build process.
 32 | const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';
 33 | 
 34 | // Check if TypeScript is setup
 35 | const useTypeScript = fs.existsSync(paths.appTsConfig);
 36 | 
 37 | // style files regexes
 38 | const cssRegex = /\.css$/;
 39 | const cssModuleRegex = /\.module\.css$/;
 40 | const sassRegex = /\.(scss|sass)$/;
 41 | const sassModuleRegex = /\.module\.(scss|sass)$/;
 42 | 
 43 | // This is the production and development configuration.
 44 | // It is focused on developer experience, fast rebuilds, and a minimal bundle.
 45 | module.exports = function(webpackEnv) {
 46 |   const isEnvDevelopment = webpackEnv === 'development';
 47 |   const isEnvProduction = webpackEnv === 'production';
 48 | 
 49 |   // Webpack uses `publicPath` to determine where the app is being served from.
 50 |   // It requires a trailing slash, or the file assets will get an incorrect path.
 51 |   // In development, we always serve from the root. This makes config easier.
 52 |   const publicPath = isEnvProduction
 53 |     ? paths.servedPath
 54 |     : isEnvDevelopment && '/';
 55 |   // Some apps do not use client-side routing with pushState.
 56 |   // For these, "homepage" can be set to "." to enable relative asset paths.
 57 |   const shouldUseRelativeAssetPaths = publicPath === './';
 58 | 
 59 |   // `publicUrl` is just like `publicPath`, but we will provide it to our app
 60 |   // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
 61 |   // Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
 62 |   const publicUrl = isEnvProduction
 63 |     ? publicPath.slice(0, -1)
 64 |     : isEnvDevelopment && '';
 65 |   // Get environment variables to inject into our app.
 66 |   const env = getClientEnvironment(publicUrl);
 67 | 
 68 |   // common function to get style loaders
 69 |   const getStyleLoaders = (cssOptions, preProcessor) => {
 70 |     const loaders = [
 71 |       isEnvDevelopment && require.resolve('style-loader'),
 72 |       isEnvProduction && {
 73 |         loader: MiniCssExtractPlugin.loader,
 74 |         options: Object.assign(
 75 |           {},
 76 |           shouldUseRelativeAssetPaths ? { publicPath: '../../' } : undefined
 77 |         ),
 78 |       },
 79 |       {
 80 |         loader: require.resolve('css-loader'),
 81 |         options: cssOptions,
 82 |       },
 83 |       {
 84 |         // Options for PostCSS as we reference these options twice
 85 |         // Adds vendor prefixing based on your specified browser support in
 86 |         // package.json
 87 |         loader: require.resolve('postcss-loader'),
 88 |         options: {
 89 |           // Necessary for external CSS imports to work
 90 |           // https://github.com/facebook/create-react-app/issues/2677
 91 |           ident: 'postcss',
 92 |           plugins: () => [
 93 |             require('postcss-flexbugs-fixes'),
 94 |             require('postcss-preset-env')({
 95 |               autoprefixer: {
 96 |                 flexbox: 'no-2009',
 97 |               },
 98 |               stage: 3,
 99 |             }),
100 |           ],
101 |           sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,
102 |         },
103 |       },
104 |     ].filter(Boolean);
105 |     if (preProcessor) {
106 |       loaders.push({
107 |         loader: require.resolve(preProcessor),
108 |         options: {
109 |           sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,
110 |         },
111 |       });
112 |     }
113 |     return loaders;
114 |   };
115 | 
116 |   return {
117 |     mode: isEnvProduction ? 'production' : isEnvDevelopment && 'development',
118 |     // Stop compilation early in production
119 |     bail: isEnvProduction,
120 |     devtool: isEnvProduction
121 |       ? shouldUseSourceMap
122 |         ? 'source-map'
123 |         : false
124 |       : isEnvDevelopment && 'eval-source-map',
125 |     // These are the "entry points" to our application.
126 |     // This means they will be the "root" imports that are included in JS bundle.
127 |     entry: [
128 |       // Include an alternative client for WebpackDevServer. A client's job is to
129 |       // connect to WebpackDevServer by a socket and get notified about changes.
130 |       // When you save a file, the client will either apply hot updates (in case
131 |       // of CSS changes), or refresh the page (in case of JS changes). When you
132 |       // make a syntax error, this client will display a syntax error overlay.
133 |       // Note: instead of the default WebpackDevServer client, we use a custom one
134 |       // to bring better experience for Create React App users. You can replace
135 |       // the line below with these two lines if you prefer the stock client:
136 |       // require.resolve('webpack-dev-server/client') + '?/',
137 |       // require.resolve('webpack/hot/dev-server'),
138 |       isEnvDevelopment &&
139 |         require.resolve('react-dev-utils/webpackHotDevClient'),
140 |       // Finally, this is your app's code:
141 |       paths.appIndexJs,
142 |       // We include the app code last so that if there is a runtime error during
143 |       // initialization, it doesn't blow up the WebpackDevServer client, and
144 |       // changing JS code would still trigger a refresh.
145 |     ].filter(Boolean),
146 |     output: {
147 |       // The build folder.
148 |       path: isEnvProduction ? paths.appBuild : undefined,
149 |       // Add /* filename */ comments to generated require()s in the output.
150 |       pathinfo: isEnvDevelopment,
151 |       // There will be one main bundle, and one file per asynchronous chunk.
152 |       // In development, it does not produce real files.
153 |       filename: isEnvProduction
154 |         ? 'static/js/[name].[chunkhash:8].js'
155 |         : isEnvDevelopment && 'static/js/bundle.js',
156 |       // There are also additional JS chunk files if you use code splitting.
157 |       chunkFilename: isEnvProduction
158 |         ? 'static/js/[name].[chunkhash:8].chunk.js'
159 |         : isEnvDevelopment && 'static/js/[name].chunk.js',
160 |       // We inferred the "public path" (such as / or /my-project) from homepage.
161 |       // We use "/" in development.
162 |       publicPath: publicPath,
163 |       // Point sourcemap entries to original disk location (format as URL on Windows)
164 |       devtoolModuleFilenameTemplate: isEnvProduction
165 |         ? info =>
166 |             path
167 |               .relative(paths.appSrc, info.absoluteResourcePath)
168 |               .replace(/\\/g, '/')
169 |         : isEnvDevelopment &&
170 |           (info => path.resolve(info.absoluteResourcePath).replace(/\\/g, '/')),
171 |     },
172 |     optimization: {
173 |       minimize: isEnvProduction,
174 |       minimizer: [
175 |         // This is only used in production mode
176 |         new TerserPlugin({
177 |           terserOptions: {
178 |             parse: {
179 |               // we want terser to parse ecma 8 code. However, we don't want it
180 |               // to apply any minfication steps that turns valid ecma 5 code
181 |               // into invalid ecma 5 code. This is why the 'compress' and 'output'
182 |               // sections only apply transformations that are ecma 5 safe
183 |               // https://github.com/facebook/create-react-app/pull/4234
184 |               ecma: 8,
185 |             },
186 |             compress: {
187 |               ecma: 5,
188 |               warnings: false,
189 |               // Disabled because of an issue with Uglify breaking seemingly valid code:
190 |               // https://github.com/facebook/create-react-app/issues/2376
191 |               // Pending further investigation:
192 |               // https://github.com/mishoo/UglifyJS2/issues/2011
193 |               comparisons: false,
194 |               // Disabled because of an issue with Terser breaking valid code:
195 |               // https://github.com/facebook/create-react-app/issues/5250
196 |               // Pending futher investigation:
197 |               // https://github.com/terser-js/terser/issues/120
198 |               inline: 2,
199 |             },
200 |             mangle: {
201 |               safari10: true,
202 |             },
203 |             output: {
204 |               ecma: 5,
205 |               comments: false,
206 |               // Turned on because emoji and regex is not minified properly using default
207 |               // https://github.com/facebook/create-react-app/issues/2488
208 |               ascii_only: true,
209 |             },
210 |           },
211 |           // Use multi-process parallel running to improve the build speed
212 |           // Default number of concurrent runs: os.cpus().length - 1
213 |           parallel: true,
214 |           // Enable file caching
215 |           cache: true,
216 |           sourceMap: shouldUseSourceMap,
217 |         }),
218 |         // This is only used in production mode
219 |         new OptimizeCSSAssetsPlugin({
220 |           cssProcessorOptions: {
221 |             parser: safePostCssParser,
222 |             map: shouldUseSourceMap
223 |               ? {
224 |                   // `inline: false` forces the sourcemap to be output into a
225 |                   // separate file
226 |                   inline: false,
227 |                   // `annotation: true` appends the sourceMappingURL to the end of
228 |                   // the css file, helping the browser find the sourcemap
229 |                   annotation: true,
230 |                 }
231 |               : false,
232 |           },
233 |         }),
234 |       ],
235 |       // Automatically split vendor and commons
236 |       // https://twitter.com/wSokra/status/969633336732905474
237 |       // https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
238 |       splitChunks: {
239 |         chunks: 'all',
240 |         name: false,
241 |       },
242 |       // Keep the runtime chunk separated to enable long term caching
243 |       // https://twitter.com/wSokra/status/969679223278505985
244 |       runtimeChunk: true,
245 |     },
246 |     resolve: {
247 |       // This allows you to set a fallback for where Webpack should look for modules.
248 |       // We placed these paths second because we want `node_modules` to "win"
249 |       // if there are any conflicts. This matches Node resolution mechanism.
250 |       // https://github.com/facebook/create-react-app/issues/253
251 |       modules: ['node_modules'].concat(
252 |         // It is guaranteed to exist because we tweak it in `env.js`
253 |         process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
254 |       ),
255 |       // These are the reasonable defaults supported by the Node ecosystem.
256 |       // We also include JSX as a common component filename extension to support
257 |       // some tools, although we do not recommend using it, see:
258 |       // https://github.com/facebook/create-react-app/issues/290
259 |       // `web` extension prefixes have been added for better support
260 |       // for React Native Web.
261 |       extensions: paths.moduleFileExtensions
262 |         .map(ext => `.${ext}`)
263 |         .filter(ext => useTypeScript || !ext.includes('ts'))
264 |         .concat(['js', 'jsx']),
265 |       alias: {
266 |         // Support React Native Web
267 |         // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
268 |         'react-native': 'react-native-web',
269 |       },
270 |       plugins: [
271 |         // Adds support for installing with Plug'n'Play, leading to faster installs and adding
272 |         // guards against forgotten dependencies and such.
273 |         PnpWebpackPlugin,
274 |         // Prevents users from importing files from outside of src/ (or node_modules/).
275 |         // This often causes confusion because we only process files within src/ with babel.
276 |         // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
277 |         // please link the files into your node_modules/ and let module-resolution kick in.
278 |         // Make sure your source files are compiled, as they will not be processed in any way.
279 |         new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
280 |       ],
281 |     },
282 |     resolveLoader: {
283 |       plugins: [
284 |         // Also related to Plug'n'Play, but this time it tells Webpack to load its loaders
285 |         // from the current package.
286 |         PnpWebpackPlugin.moduleLoader(module),
287 |       ],
288 |     },
289 |     module: {
290 |       strictExportPresence: true,
291 |       rules: [
292 |         // Disable require.ensure as it's not a standard language feature.
293 |         { parser: { requireEnsure: false } },
294 | 
295 |         // First, run the linter.
296 |         // It's important to do this before Babel processes the JS.
297 |         {
298 |           test: /\.(js|mjs|jsx)$/,
299 |           enforce: 'pre',
300 |           use: [
301 |             {
302 |               options: {
303 |                 formatter: require.resolve('react-dev-utils/eslintFormatter'),
304 |                 eslintPath: require.resolve('eslint'),
305 |                 
306 |               },
307 |               loader: require.resolve('eslint-loader'),
308 |             },
309 |           ],
310 |           include: paths.appSrc,
311 |         },
312 |         {
313 |           // "oneOf" will traverse all following loaders until one will
314 |           // match the requirements. When no loader matches it will fall
315 |           // back to the "file" loader at the end of the loader list.
316 |           oneOf: [
317 |             // "url" loader works like "file" loader except that it embeds assets
318 |             // smaller than specified limit in bytes as data URLs to avoid requests.
319 |             // A missing `test` is equivalent to a match.
320 |             {
321 |               test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
322 |               loader: require.resolve('url-loader'),
323 |               options: {
324 |                 limit: 10000,
325 |                 name: 'static/media/[name].[hash:8].[ext]',
326 |               },
327 |             },
328 |             // Process application JS with Babel.
329 |             // The preset includes JSX, Flow, TypeScript, and some ESnext features.
330 |             {
331 |               test: /\.(js|mjs|jsx|ts|tsx)$/,
332 |               include: paths.appSrc,
333 |               loader: require.resolve('babel-loader'),
334 |               options: {
335 |                 customize: require.resolve(
336 |                   'babel-preset-react-app/webpack-overrides'
337 |                 ),
338 |                 
339 |                 plugins: [
340 |                   [
341 |                     require.resolve('babel-plugin-named-asset-import'),
342 |                     {
343 |                       loaderMap: {
344 |                         svg: {
345 |                           ReactComponent: '@svgr/webpack?-svgo![path]',
346 |                         },
347 |                       },
348 |                     },
349 |                   ],
350 |                 ],
351 |                 // This is a feature of `babel-loader` for webpack (not Babel itself).
352 |                 // It enables caching results in ./node_modules/.cache/babel-loader/
353 |                 // directory for faster rebuilds.
354 |                 cacheDirectory: true,
355 |                 cacheCompression: isEnvProduction,
356 |                 compact: isEnvProduction,
357 |               },
358 |             },
359 |             // Process any JS outside of the app with Babel.
360 |             // Unlike the application JS, we only compile the standard ES features.
361 |             {
362 |               test: /\.(js|mjs)$/,
363 |               exclude: /@babel(?:\/|\\{1,2})runtime/,
364 |               loader: require.resolve('babel-loader'),
365 |               options: {
366 |                 babelrc: false,
367 |                 configFile: false,
368 |                 compact: false,
369 |                 presets: [
370 |                   [
371 |                     require.resolve('babel-preset-react-app/dependencies'),
372 |                     { helpers: true },
373 |                   ],
374 |                 ],
375 |                 cacheDirectory: true,
376 |                 cacheCompression: isEnvProduction,
377 |                 
378 |                 // If an error happens in a package, it's possible to be
379 |                 // because it was compiled. Thus, we don't want the browser
380 |                 // debugger to show the original code. Instead, the code
381 |                 // being evaluated would be much more helpful.
382 |                 sourceMaps: false,
383 |               },
384 |             },
385 |             // "postcss" loader applies autoprefixer to our CSS.
386 |             // "css" loader resolves paths in CSS and adds assets as dependencies.
387 |             // "style" loader turns CSS into JS modules that inject <style> tags.
388 |             // In production, we use MiniCSSExtractPlugin to extract that CSS
389 |             // to a file, but in development "style" loader enables hot editing
390 |             // of CSS.
391 |             // By default we support CSS Modules with the extension .module.css
392 |             {
393 |               test: cssRegex,
394 |               exclude: cssModuleRegex,
395 |               use: getStyleLoaders({
396 |                 importLoaders: 1,
397 |                 sourceMap: isEnvProduction
398 |                   ? shouldUseSourceMap
399 |                   : isEnvDevelopment,
400 |               }),
401 |               // Don't consider CSS imports dead code even if the
402 |               // containing package claims to have no side effects.
403 |               // Remove this when webpack adds a warning or an error for this.
404 |               // See https://github.com/webpack/webpack/issues/6571
405 |               sideEffects: true,
406 |             },
407 |             // Adds support for CSS Modules (https://github.com/css-modules/css-modules)
408 |             // using the extension .module.css
409 |             {
410 |               test: cssModuleRegex,
411 |               use: getStyleLoaders({
412 |                 importLoaders: 1,
413 |                 sourceMap: isEnvProduction
414 |                   ? shouldUseSourceMap
415 |                   : isEnvDevelopment,
416 |                 modules: true,
417 |                 getLocalIdent: getCSSModuleLocalIdent,
418 |               }),
419 |             },
420 |             // Opt-in support for SASS (using .scss or .sass extensions).
421 |             // By default we support SASS Modules with the
422 |             // extensions .module.scss or .module.sass
423 |             {
424 |               test: sassRegex,
425 |               exclude: sassModuleRegex,
426 |               use: getStyleLoaders(
427 |                 {
428 |                   importLoaders: 2,
429 |                   sourceMap: isEnvProduction
430 |                     ? shouldUseSourceMap
431 |                     : isEnvDevelopment,
432 |                 },
433 |                 'sass-loader'
434 |               ),
435 |               // Don't consider CSS imports dead code even if the
436 |               // containing package claims to have no side effects.
437 |               // Remove this when webpack adds a warning or an error for this.
438 |               // See https://github.com/webpack/webpack/issues/6571
439 |               sideEffects: true,
440 |             },
441 |             // Adds support for CSS Modules, but using SASS
442 |             // using the extension .module.scss or .module.sass
443 |             {
444 |               test: sassModuleRegex,
445 |               use: getStyleLoaders(
446 |                 {
447 |                   importLoaders: 2,
448 |                   sourceMap: isEnvProduction
449 |                     ? shouldUseSourceMap
450 |                     : isEnvDevelopment,
451 |                   modules: true,
452 |                   getLocalIdent: getCSSModuleLocalIdent,
453 |                 },
454 |                 'sass-loader'
455 |               ),
456 |             },
457 |             // "file" loader makes sure those assets get served by WebpackDevServer.
458 |             // When you `import` an asset, you get its (virtual) filename.
459 |             // In production, they would get copied to the `build` folder.
460 |             // This loader doesn't use a "test" so it will catch all modules
461 |             // that fall through the other loaders.
462 |             {
463 |               loader: require.resolve('file-loader'),
464 |               // Exclude `js` files to keep "css" loader working as it injects
465 |               // its runtime that would otherwise be processed through "file" loader.
466 |               // Also exclude `html` and `json` extensions so they get processed
467 |               // by webpacks internal loaders.
468 |               exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
469 |               options: {
470 |                 name: 'static/media/[name].[hash:8].[ext]',
471 |               },
472 |             },
473 |             // ** STOP ** Are you adding a new loader?
474 |             // Make sure to add the new loader(s) before the "file" loader.
475 |           ],
476 |         },
477 |       ],
478 |     },
479 |     plugins: [
480 |       // Generates an `index.html` file with the <script> injected.
481 |       new HtmlWebpackPlugin(
482 |         Object.assign(
483 |           {},
484 |           {
485 |             inject: true,
486 |             template: paths.appHtml,
487 |           },
488 |           isEnvProduction
489 |             ? {
490 |                 minify: {
491 |                   removeComments: true,
492 |                   collapseWhitespace: true,
493 |                   removeRedundantAttributes: true,
494 |                   useShortDoctype: true,
495 |                   removeEmptyAttributes: true,
496 |                   removeStyleLinkTypeAttributes: true,
497 |                   keepClosingSlash: true,
498 |                   minifyJS: true,
499 |                   minifyCSS: true,
500 |                   minifyURLs: true,
501 |                 },
502 |               }
503 |             : undefined
504 |         )
505 |       ),
506 |       // Inlines the webpack runtime script. This script is too small to warrant
507 |       // a network request.
508 |       isEnvProduction &&
509 |         shouldInlineRuntimeChunk &&
510 |         new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/runtime~.+[.]js/]),
511 |       // Makes some environment variables available in index.html.
512 |       // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
513 |       // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
514 |       // In production, it will be an empty string unless you specify "homepage"
515 |       // in `package.json`, in which case it will be the pathname of that URL.
516 |       // In development, this will be an empty string.
517 |       new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
518 |       // This gives some necessary context to module not found errors, such as
519 |       // the requesting resource.
520 |       new ModuleNotFoundPlugin(paths.appPath),
521 |       // Makes some environment variables available to the JS code, for example:
522 |       // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
523 |       // It is absolutely essential that NODE_ENV is set to production
524 |       // during a production build.
525 |       // Otherwise React will be compiled in the very slow development mode.
526 |       new webpack.DefinePlugin(env.stringified),
527 |       // This is necessary to emit hot updates (currently CSS only):
528 |       isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
529 |       // Watcher doesn't work well if you mistype casing in a path so we use
530 |       // a plugin that prints an error when you attempt to do this.
531 |       // See https://github.com/facebook/create-react-app/issues/240
532 |       isEnvDevelopment && new CaseSensitivePathsPlugin(),
533 |       // If you require a missing module and then `npm install` it, you still have
534 |       // to restart the development server for Webpack to discover it. This plugin
535 |       // makes the discovery automatic so you don't have to restart.
536 |       // See https://github.com/facebook/create-react-app/issues/186
537 |       isEnvDevelopment &&
538 |         new WatchMissingNodeModulesPlugin(paths.appNodeModules),
539 |       isEnvProduction &&
540 |         new MiniCssExtractPlugin({
541 |           // Options similar to the same options in webpackOptions.output
542 |           // both options are optional
543 |           filename: 'static/css/[name].[contenthash:8].css',
544 |           chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',
545 |         }),
546 |       // Generate a manifest file which contains a mapping of all asset filenames
547 |       // to their corresponding output file so that tools can pick it up without
548 |       // having to parse `index.html`.
549 |       new ManifestPlugin({
550 |         fileName: 'asset-manifest.json',
551 |         publicPath: publicPath,
552 |       }),
553 |       // Moment.js is an extremely popular library that bundles large locale files
554 |       // by default due to how Webpack interprets its code. This is a practical
555 |       // solution that requires the user to opt into importing specific locales.
556 |       // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
557 |       // You can remove this if you don't use Moment.js:
558 |       new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
559 |       // Generate a service worker script that will precache, and keep up to date,
560 |       // the HTML & assets that are part of the Webpack build.
561 |       isEnvProduction &&
562 |         new WorkboxWebpackPlugin.GenerateSW({
563 |           clientsClaim: true,
564 |           exclude: [/\.map$/, /asset-manifest\.json$/],
565 |           importWorkboxFrom: 'cdn',
566 |           navigateFallback: publicUrl + '/index.html',
567 |           navigateFallbackBlacklist: [
568 |             // Exclude URLs starting with /_, as they're likely an API call
569 |             new RegExp('^/_'),
570 |             // Exclude URLs containing a dot, as they're likely a resource in
571 |             // public/ and not a SPA route
572 |             new RegExp('/[^/]+\\.[^/]+$'),
573 |           ],
574 |         }),
575 |       // TypeScript type checking
576 |       useTypeScript &&
577 |         new ForkTsCheckerWebpackPlugin({
578 |           typescript: resolve.sync('typescript', {
579 |             basedir: paths.appNodeModules,
580 |           }),
581 |           async: false,
582 |           checkSyntacticErrors: true,
583 |           tsconfig: paths.appTsConfig,
584 |           compilerOptions: {
585 |             module: 'esnext',
586 |             moduleResolution: 'node',
587 |             resolveJsonModule: true,
588 |             isolatedModules: true,
589 |             noEmit: true,
590 |             jsx: 'preserve',
591 |           },
592 |           reportFiles: [
593 |             '**',
594 |             '!**/*.json',
595 |             '!**/__tests__/**',
596 |             '!**/?(*.)(spec|test).*',
597 |             '!**/src/setupProxy.*',
598 |             '!**/src/setupTests.*',
599 |           ],
600 |           watch: paths.appSrc,
601 |           silent: true,
602 |           formatter: typescriptFormatter,
603 |         }),
604 |     ].filter(Boolean),
605 |     // Some libraries import Node modules but don't use them in the browser.
606 |     // Tell Webpack to provide empty mocks for them so importing them works.
607 |     node: {
608 |       module: 'empty',
609 |       dgram: 'empty',
610 |       dns: 'mock',
611 |       fs: 'empty',
612 |       net: 'empty',
613 |       tls: 'empty',
614 |       child_process: 'empty',
615 |     },
616 |     // Turn off performance processing because we utilize
617 |     // our own hints via the FileSizeReporter
618 |     performance: false,
619 |   };
620 | };
621 | 


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