├── public
    ├── favicon.ico
    ├── app
    │   └── background.js
    ├── css
    │   └── root.css
    ├── manifest.json
    └── index.html
├── .github
    └── ISSUE_TEMPLATE
    │   ├── ask-question.md
    │   ├── feature_request.md
    │   └── bug_report.md
├── src
    ├── index.js
    ├── App.test.js
    ├── App.css
    ├── App.js
    ├── content.js
    ├── logo.svg
    └── registerServiceWorker.js
├── config
    ├── jest
    │   ├── fileTransform.js
    │   └── cssTransform.js
    ├── polyfills.js
    ├── paths.js
    ├── env.js
    ├── webpackDevServer.config.js
    ├── webpack.config.dev.js
    └── webpack.config.prod.js
├── .gitignore
├── scripts
    ├── test.js
    ├── start.js
    └── build.js
├── LICENSE
├── README.md
├── CODE_OF_CONDUCT.md
└── package.json


/public/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/satendra02/react-chrome-extension/HEAD/public/favicon.ico


--------------------------------------------------------------------------------
/.github/ISSUE_TEMPLATE/ask-question.md:
--------------------------------------------------------------------------------
 1 | ---
 2 | name: Ask question
 3 | about: What is in your mind
 4 | title: ''
 5 | labels: ''
 6 | assignees: ''
 7 | 
 8 | ---
 9 | 
10 | 
11 | 


--------------------------------------------------------------------------------
/src/index.js:
--------------------------------------------------------------------------------
1 | import React from 'react';
2 | import ReactDOM from 'react-dom';
3 | import App from './App';
4 | import registerServiceWorker from './registerServiceWorker';
5 | 
6 | ReactDOM.render(<App isExt={false}/>, document.getElementById('root'));
7 | registerServiceWorker();
8 | 


--------------------------------------------------------------------------------
/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 | 


--------------------------------------------------------------------------------
/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 |     return `module.exports = ${JSON.stringify(path.basename(filename))};`;
11 |   },
12 | };
13 | 


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


--------------------------------------------------------------------------------
/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 | 


--------------------------------------------------------------------------------
/public/app/background.js:
--------------------------------------------------------------------------------
 1 | // Called when the user clicks on the browser action
 2 | chrome.action.onClicked.addListener(function (tab) {
 3 |   // Send a message to the active tab
 4 |   chrome.tabs.query({ active: true, currentWindow: true }, function (tabs) {
 5 |     var activeTab = tabs[0];
 6 |     chrome.tabs.sendMessage(activeTab.id, {
 7 |       message: "clicked_browser_action",
 8 |     });
 9 |   });
10 | });
11 | 


--------------------------------------------------------------------------------
/public/css/root.css:
--------------------------------------------------------------------------------
 1 | body {
 2 |     margin: 0;
 3 |     padding: 0;
 4 |     font-family: sans-serif;
 5 | }
 6 |   
 7 | #my-extension-root{
 8 |     width: 400px;
 9 |     height: 100%;
10 |     position: fixed;
11 |     top: 0px;
12 |     right: 0px;
13 |     z-index: 2147483647;
14 |     background-color: white;
15 |     box-shadow: 0px 0px 5px #0000009e;
16 | }
17 |   
18 | #my-extension-root iframe {
19 |     width: 100%;
20 |     height: 100%;
21 |     border: none;
22 | }


--------------------------------------------------------------------------------
/src/App.css:
--------------------------------------------------------------------------------
 1 | .App {
 2 |   text-align: center;
 3 | }
 4 | 
 5 | .App-logo {
 6 |   animation: App-logo-spin infinite 20s linear;
 7 |   height: 80px;
 8 | }
 9 | 
10 | .App-header {
11 |   background-color: #222;
12 |   height: 150px;
13 |   padding: 20px;
14 |   color: white;
15 | }
16 | 
17 | .App-title {
18 |   font-size: 1.5em;
19 | }
20 | 
21 | .App-intro {
22 |   font-size: large;
23 | }
24 | 
25 | @keyframes App-logo-spin {
26 |   from { transform: rotate(0deg); }
27 |   to { transform: rotate(360deg); }
28 | }
29 | 


--------------------------------------------------------------------------------
/public/manifest.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "short_name": "My Extension",
 3 |   "name": "My Extension",
 4 |   "version": "1.1",
 5 |   "manifest_version": 3,
 6 |   "background": {
 7 |     "service_worker": "app/background.js"
 8 |   },
 9 |   "action": {},
10 |   "content_scripts": [
11 |     {
12 |       "matches": ["<all_urls>"],
13 |       "css": ["/css/root.css"],
14 |       "js": ["/static/js/content.js"]
15 |     }
16 |   ],
17 |   "web_accessible_resources": [
18 |     {
19 |       "resources": ["/static/css/content.css", "/static/media/*"],
20 |       "matches": ["<all_urls>"]
21 |     }
22 |   ]
23 | }
24 | 


--------------------------------------------------------------------------------
/.github/ISSUE_TEMPLATE/feature_request.md:
--------------------------------------------------------------------------------
 1 | ---
 2 | name: Feature request
 3 | about: Suggest an idea for this project
 4 | title: ''
 5 | labels: ''
 6 | assignees: ''
 7 | 
 8 | ---
 9 | 
10 | **Is your feature request related to a problem? Please describe.**
11 | A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
12 | 
13 | **Describe the solution you'd like**
14 | A clear and concise description of what you want to happen.
15 | 
16 | **Describe alternatives you've considered**
17 | A clear and concise description of any alternative solutions or features you've considered.
18 | 
19 | **Additional context**
20 | Add any other context or screenshots about the feature request here.
21 | 


--------------------------------------------------------------------------------
/config/polyfills.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | if (typeof Promise === 'undefined') {
 4 |   // Rejection tracking prevents a common issue where React gets into an
 5 |   // inconsistent state due to an error, but it gets swallowed by a Promise,
 6 |   // and the user has no idea what causes React's erratic future behavior.
 7 |   require('promise/lib/rejection-tracking').enable();
 8 |   window.Promise = require('promise/lib/es6-extensions.js');
 9 | }
10 | 
11 | // fetch() polyfill for making API calls.
12 | require('whatwg-fetch');
13 | 
14 | // In tests, polyfill requestAnimationFrame since jsdom doesn't provide it yet.
15 | // We don't polyfill it in the browser--this is user's responsibility.
16 | if (process.env.NODE_ENV === 'test') {
17 |   require('raf').polyfill(global);
18 | }
19 | 


--------------------------------------------------------------------------------
/src/App.js:
--------------------------------------------------------------------------------
 1 | /*global chrome*/
 2 | 
 3 | import React, { Component } from 'react';
 4 | import logo from './logo.svg';
 5 | import './App.css';
 6 | 
 7 | class App extends Component {
 8 |   render() {
 9 |     return (
10 |       <div className="App">
11 |         <header className="App-header">
12 |           {this.props.isExt ? 
13 |             <img src={chrome.runtime.getURL("static/media/logo.svg")} className="App-logo" alt="logo" />
14 |           :
15 |             <img src={logo} className="App-logo" alt="logo" />
16 |           }
17 | 
18 |           <h1 className="App-title">Welcome to React</h1>
19 |         </header>
20 |         <p className="App-intro">
21 |           To get started, edit <code>src/App.js</code> and save to reload.
22 |         </p>
23 |       </div>
24 |     );
25 |   }
26 | }
27 | 
28 | export default App;
29 | 


--------------------------------------------------------------------------------
/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 | const jest = require('jest');
19 | let argv = process.argv.slice(2);
20 | 
21 | // Watch unless on CI or in coverage mode
22 | if (!process.env.CI && argv.indexOf('--coverage') < 0) {
23 |   argv.push('--watch');
24 | }
25 | 
26 | 
27 | jest.run(argv);
28 | 


--------------------------------------------------------------------------------
/.github/ISSUE_TEMPLATE/bug_report.md:
--------------------------------------------------------------------------------
 1 | ---
 2 | name: Bug report
 3 | about: Create a report to help us improve
 4 | title: ''
 5 | labels: ''
 6 | assignees: ''
 7 | 
 8 | ---
 9 | 
10 | **Describe the bug**
11 | A clear and concise description of what the bug is.
12 | 
13 | **To Reproduce**
14 | Steps to reproduce the behavior:
15 | 1. Go to '...'
16 | 2. Click on '....'
17 | 3. Scroll down to '....'
18 | 4. See error
19 | 
20 | **Expected behavior**
21 | A clear and concise description of what you expected to happen.
22 | 
23 | **Screenshots**
24 | If applicable, add screenshots to help explain your problem.
25 | 
26 | **Desktop (please complete the following information):**
27 |  - OS: [e.g. iOS]
28 |  - Browser [e.g. chrome, safari]
29 |  - Version [e.g. 22]
30 | 
31 | **Smartphone (please complete the following information):**
32 |  - Device: [e.g. iPhone6]
33 |  - OS: [e.g. iOS8.1]
34 |  - Browser [e.g. stock browser, safari]
35 |  - Version [e.g. 22]
36 | 
37 | **Additional context**
38 | Add any other context about the problem here.
39 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2018 Satendra Rai
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


--------------------------------------------------------------------------------
/src/content.js:
--------------------------------------------------------------------------------
 1 | /*global chrome*/
 2 | /* src/content.js */
 3 | import React from 'react';
 4 | import ReactDOM from 'react-dom';
 5 | import Frame, { FrameContextConsumer }from 'react-frame-component';
 6 | import App from "./App";
 7 | class Main extends React.Component {
 8 |     render() {
 9 |         return (
10 |             <Frame head={[<link type="text/css" rel="stylesheet" href={chrome.runtime.getURL("/static/css/content.css")} ></link>]}> 
11 |                <FrameContextConsumer>
12 |                {
13 |                   ({document, window}) => {
14 |                     return <App document={document} window={window} isExt={true}/> 
15 |                   }
16 |                 }
17 |                 </FrameContextConsumer>
18 |             </Frame>
19 |         )
20 |     }
21 | }
22 | 
23 | const app = document.createElement('div');
24 | app.id = "my-extension-root";
25 | 
26 | document.body.appendChild(app);
27 | ReactDOM.render(<Main />, app);
28 | 
29 | app.style.display = "none";
30 | 
31 | chrome.runtime.onMessage.addListener(
32 |    function(request, sender, sendResponse) {
33 |       if( request.message === "clicked_browser_action") {
34 |         toggle();
35 |       }
36 |    }
37 | );
38 | 
39 | function toggle(){
40 |    if(app.style.display === "none"){
41 |      app.style.display = "block";
42 |    }else{
43 |      app.style.display = "none";
44 |    }
45 | }
46 | 


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


--------------------------------------------------------------------------------
/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/facebookincubator/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(path, needsSlash) {
15 |   const hasSlash = path.endsWith('/');
16 |   if (hasSlash && !needsSlash) {
17 |     return path.substr(path, path.length - 1);
18 |   } else if (!hasSlash && needsSlash) {
19 |     return `${path}/`;
20 |   } else {
21 |     return path;
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 | // config after eject: we're in ./config/
42 | module.exports = {
43 |   dotenv: resolveApp('.env'),
44 |   appBuild: resolveApp('build'),
45 |   appPublic: resolveApp('public'),
46 |   appHtml: resolveApp('public/index.html'),
47 |   appIndexJs: resolveApp('src/index.js'),
48 |   appPackageJson: resolveApp('package.json'),
49 |   appSrc: resolveApp('src'),
50 |   yarnLockFile: resolveApp('yarn.lock'),
51 |   testsSetup: resolveApp('src/setupTests.js'),
52 |   appNodeModules: resolveApp('node_modules'),
53 |   publicUrl: getPublicUrl(resolveApp('package.json')),
54 |   servedPath: getServedPath(resolveApp('package.json')),
55 | };
56 | 


--------------------------------------------------------------------------------
/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 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # React Chrome Extension
 2 | A chrome extension boilerplate project with ReactJs using inject page strategy. 
 3 | 
 4 | Stop worrying about the configurational challenges of setting up the Chrome extension, just start writing your components as usual. Read [detailed blog](https://medium.com/@satendra02/create-chrome-extension-with-reactjs-using-inject-page-strategy-137650de1f39)
 5 | 
 6 | >This project is sponsored By [Recast Studio](https://recast.studio)
 7 | 
 8 | 
 9 | The boilerplate is to quickly create a chrome extension using ReactJs, The motivation behind creating a boilerplate was:
10 | 1. Instead of Chrome's ready-made popup, We wanted our page injected into DOM as a sidebar for better UX.
11 | 
12 | 2. We wanted to use ReactJs for the Component-based approach, Routing, and its build mechanism.
13 | 
14 | 3. We need to make sure that the extension CSS does not conflict with the host page styles in any case.
15 | 
16 | 
17 | ## Features
18 | 
19 | - Used ReactJs to write Chrome extension
20 | - Injecting extension to host page as a content script
21 | - Utilized the Chrome messaging API
22 | - Isolated extension CSS using Iframe
23 | 
24 | ## Installation
25 | >Make sure you have **NodeJs(>18)** version installed
26 | 
27 | Clone repo
28 | 
29 | ```
30 | git clone https://github.com/satendra02/react-chrome-extension.git
31 | ```
32 | Go to the `react-chrome-extension` directory and run
33 | 
34 | ```
35 | yarn install
36 | ```
37 | Now build the extension using
38 | ```
39 | yarn build
40 | ```
41 | You will see a `build` folder generated inside `[PROJECT_HOME]`
42 | 
43 | To avoid running `yarn build` after updating any file, you can run
44 | 
45 | ```
46 | yarn watch
47 | ```
48 | 
49 | which listens to any local file changes, and rebuilds automatically.
50 | 
51 | ## Adding React app extension to Chrome
52 | 
53 | In the Chrome browser, go to chrome://extensions page and switch on developer mode. This enables the ability to locally install a Chrome extension.
54 | 
55 | <img src="https://cdn-images-1.medium.com/max/1600/1*OaygCwLSwLakyTqCADbmDw.png" />
56 | 
57 | Now click on the `LOAD UNPACKED` and browse to `[PROJECT_HOME]\build`, This will install the React app as a Chrome extension.
58 | 
59 | When you go to any website and click on the extension icon, the injected page will toggle.
60 | 
61 | <img src="https://cdn-images-1.medium.com/max/1600/1*bXJYfvrcHDWKwUZCrPI-8w.png" />
62 | 
63 | ## Using SASS
64 | 
65 | Boilerplate contains [sass-loader](https://github.com/webpack-contrib/sass-loader), so you can use SASS instead of pure CSS in your project. To do so:
66 | 1. Rename ```src/App.css``` file to ```src/App.scss``` 
67 | 2. Change import line in ```src/app.js``` from 
68 |  ```import './App.css';```  to ```import './App.scss';```
69 | 
70 | ## Contributing
71 | 
72 | Bug reports and pull requests are welcome on GitHub at https://github.com/satendra02/react-chrome-extension/. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
73 | 
74 | 
75 | ## License
76 | 
77 | The repo is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
78 | 


--------------------------------------------------------------------------------
/CODE_OF_CONDUCT.md:
--------------------------------------------------------------------------------
 1 | # Contributor Covenant Code of Conduct
 2 | 
 3 | ## Our Pledge
 4 | 
 5 | In the interest of fostering an open and welcoming environment, we as
 6 | contributors and maintainers pledge to making participation in our project and
 7 | our community a harassment-free experience for everyone, regardless of age, body
 8 | size, disability, ethnicity, sex characteristics, gender identity and expression,
 9 | level of experience, education, socio-economic status, nationality, personal
10 | appearance, race, religion, or sexual identity and orientation.
11 | 
12 | ## Our Standards
13 | 
14 | Examples of behavior that contributes to creating a positive environment
15 | include:
16 | 
17 | * Using welcoming and inclusive language
18 | * Being respectful of differing viewpoints and experiences
19 | * Gracefully accepting constructive criticism
20 | * Focusing on what is best for the community
21 | * Showing empathy towards other community members
22 | 
23 | Examples of unacceptable behavior by participants include:
24 | 
25 | * The use of sexualized language or imagery and unwelcome sexual attention or
26 |  advances
27 | * Trolling, insulting/derogatory comments, and personal or political attacks
28 | * Public or private harassment
29 | * Publishing others' private information, such as a physical or electronic
30 |  address, without explicit permission
31 | * Other conduct which could reasonably be considered inappropriate in a
32 |  professional setting
33 | 
34 | ## Our Responsibilities
35 | 
36 | Project maintainers are responsible for clarifying the standards of acceptable
37 | behavior and are expected to take appropriate and fair corrective action in
38 | response to any instances of unacceptable behavior.
39 | 
40 | Project maintainers have the right and responsibility to remove, edit, or
41 | reject comments, commits, code, wiki edits, issues, and other contributions
42 | that are not aligned to this Code of Conduct, or to ban temporarily or
43 | permanently any contributor for other behaviors that they deem inappropriate,
44 | threatening, offensive, or harmful.
45 | 
46 | ## Scope
47 | 
48 | This Code of Conduct applies both within project spaces and in public spaces
49 | when an individual is representing the project or its community. Examples of
50 | representing a project or community include using an official project e-mail
51 | address, posting via an official social media account, or acting as an appointed
52 | representative at an online or offline event. Representation of a project may be
53 | further defined and clarified by project maintainers.
54 | 
55 | ## Enforcement
56 | 
57 | Instances of abusive, harassing, or otherwise unacceptable behavior may be
58 | reported by contacting the project team at satendra12cs@gmail.com. All
59 | complaints will be reviewed and investigated and will result in a response that
60 | is deemed necessary and appropriate to the circumstances. The project team is
61 | obligated to maintain confidentiality with regard to the reporter of an incident.
62 | Further details of specific enforcement policies may be posted separately.
63 | 
64 | Project maintainers who do not follow or enforce the Code of Conduct in good
65 | faith may face temporary or permanent repercussions as determined by other
66 | members of the project's leadership.
67 | 
68 | ## Attribution
69 | 
70 | This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
71 | available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
72 | 
73 | [homepage]: https://www.contributor-covenant.org
74 | 
75 | For answers to common questions about this code of conduct, see
76 | https://www.contributor-covenant.org/faq
77 | 


--------------------------------------------------------------------------------
/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/facebookincubator/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/facebookincubator/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": "my-extension",
  3 |   "version": "0.1.0",
  4 |   "private": true,
  5 |   "dependencies": {
  6 |     "@babel/runtime": "^7.10.4",
  7 |     "autoprefixer": "^9.8.5",
  8 |     "case-sensitive-paths-webpack-plugin": "^2.3.0",
  9 |     "chalk": "^4.1.0",
 10 |     "css-loader": "^3.6.0",
 11 |     "dotenv": "^8.2.0",
 12 |     "dotenv-expand": "^5.1.0",
 13 |     "fs-extra": "^9.0.1",
 14 |     "postcss-flexbugs-fixes": "^4.2.1",
 15 |     "promise": "8.0.1",
 16 |     "prop-types": "^15.7.2",
 17 |     "raf": "3.4.1",
 18 |     "react": "^16.13.1",
 19 |     "react-dom": "^16.13.1",
 20 |     "react-frame-component": "^4.1.2",
 21 |     "resolve": "^1.17.0",
 22 |     "whatwg-fetch": "3.2.0"
 23 |   },
 24 |   "scripts": {
 25 |     "start": "node scripts/start.js",
 26 |     "build": "node scripts/build.js",
 27 |     "test": "node scripts/test.js --env=jsdom",
 28 |     "watch": "npm-watch"
 29 |   },
 30 |   "watch": {
 31 |     "build": {
 32 |       "patterns": [
 33 |         "src",
 34 |         "public"
 35 |       ],
 36 |       "extensions": "js,html,scss,css,json,svg"
 37 |     }
 38 |   },
 39 |   "jest": {
 40 |     "collectCoverageFrom": [
 41 |       "src/**/*.{js,jsx,mjs}"
 42 |     ],
 43 |     "setupFiles": [
 44 |       "<rootDir>/config/polyfills.js"
 45 |     ],
 46 |     "testMatch": [
 47 |       "<rootDir>/src/**/__tests__/**/*.{js,jsx,mjs}",
 48 |       "<rootDir>/src/**/?(*.)(spec|test).{js,jsx,mjs}"
 49 |     ],
 50 |     "testEnvironment": "node",
 51 |     "testURL": "http://localhost",
 52 |     "transform": {
 53 |       "^.+\\.(js|jsx|mjs)$": "<rootDir>/node_modules/babel-jest",
 54 |       "^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
 55 |       "^(?!.*\\.(js|jsx|mjs|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
 56 |     },
 57 |     "transformIgnorePatterns": [
 58 |       "[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs)$"
 59 |     ],
 60 |     "moduleNameMapper": {
 61 |       "^react-native$": "react-native-web"
 62 |     },
 63 |     "moduleFileExtensions": [
 64 |       "web.js",
 65 |       "js",
 66 |       "json",
 67 |       "web.jsx",
 68 |       "jsx",
 69 |       "node",
 70 |       "mjs"
 71 |     ]
 72 |   },
 73 |   "babel": {
 74 |     "presets": [
 75 |       "react-app",
 76 |       "@babel/preset-env",
 77 |       "@babel/preset-react"
 78 |     ],
 79 |     "plugins": [
 80 |       "@babel/plugin-proposal-class-properties"
 81 |     ]
 82 |   },
 83 |   "eslintConfig": {
 84 |     "extends": "react-app"
 85 |   },
 86 |   "devDependencies": {
 87 |     "@babel/core": "^7.10.4",
 88 |     "@babel/plugin-proposal-class-properties": "^7.18.6",
 89 |     "@babel/plugin-transform-runtime": "^7.10.4",
 90 |     "@babel/preset-env": "^7.10.4",
 91 |     "@babel/preset-react": "^7.10.4",
 92 |     "@typescript-eslint/eslint-plugin": "^3.6.0",
 93 |     "@typescript-eslint/parser": "^3.6.0",
 94 |     "babel-eslint": "^10.1.0",
 95 |     "babel-jest": "^26.1.0",
 96 |     "babel-loader": "^8.1.0",
 97 |     "babel-preset-react-app": "^9.1.2",
 98 |     "eslint": "^7.4.0",
 99 |     "eslint-config-react-app": "^5.2.1",
100 |     "eslint-loader": "^4.0.2",
101 |     "eslint-plugin-flowtype": "^5.2.0",
102 |     "eslint-plugin-import": "^2.22.0",
103 |     "eslint-plugin-jsx-a11y": "^6.3.1",
104 |     "eslint-plugin-react": "^7.20.3",
105 |     "eslint-plugin-react-hooks": "^4.0.7",
106 |     "file-loader": "^6.0.0",
107 |     "html-webpack-plugin": "^4.3.0",
108 |     "jest": "^26.1.0",
109 |     "mini-css-extract-plugin": "^0.9.0",
110 |     "node-sass": "9.0.0",
111 |     "npm-watch": "^0.6.0",
112 |     "postcss-loader": "^3.0.0",
113 |     "react-dev-utils": "^10.2.1",
114 |     "sass-loader": "^10.0.3",
115 |     "style-loader": "^1.2.1",
116 |     "sw-precache-webpack-plugin": "^1.0.0",
117 |     "url-loader": "^4.1.0",
118 |     "webpack": "^4.43.0",
119 |     "webpack-cli": "^3.3.12",
120 |     "webpack-dev-server": "^3.11.0",
121 |     "webpack-manifest-plugin": "^2.2.0"
122 |   }
123 | }
124 | 


--------------------------------------------------------------------------------
/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 | const fs = require('fs');
 18 | const chalk = require('chalk');
 19 | const webpack = require('webpack');
 20 | const WebpackDevServer = require('webpack-dev-server');
 21 | const clearConsole = require('react-dev-utils/clearConsole');
 22 | const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
 23 | const {
 24 |   choosePort,
 25 |   createCompiler,
 26 |   prepareProxy,
 27 |   prepareUrls,
 28 | } = require('react-dev-utils/WebpackDevServerUtils');
 29 | const openBrowser = require('react-dev-utils/openBrowser');
 30 | const paths = require('../config/paths');
 31 | const config = require('../config/webpack.config.dev');
 32 | const createDevServerConfig = require('../config/webpackDevServer.config');
 33 | 
 34 | const useYarn = fs.existsSync(paths.yarnLockFile);
 35 | const isInteractive = process.stdout.isTTY;
 36 | 
 37 | // Warn and crash if required files are missing
 38 | if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
 39 |   process.exit(1);
 40 | }
 41 | 
 42 | // Tools like Cloud9 rely on this.
 43 | const DEFAULT_PORT = parseInt(process.env.PORT, 10) || 3000;
 44 | const HOST = process.env.HOST || '0.0.0.0';
 45 | 
 46 | if (process.env.HOST) {
 47 |   console.log(
 48 |     chalk.cyan(
 49 |       `Attempting to bind to HOST environment variable: ${chalk.yellow(
 50 |         chalk.bold(process.env.HOST)
 51 |       )}`
 52 |     )
 53 |   );
 54 |   console.log(
 55 |     `If this was unintentional, check that you haven't mistakenly set it in your shell.`
 56 |   );
 57 |   console.log(`Learn more here: ${chalk.yellow('http://bit.ly/2mwWSwH')}`);
 58 |   console.log();
 59 | }
 60 | 
 61 | // We attempt to use the default port but if it is busy, we offer the user to
 62 | // run on a different port. `choosePort()` Promise resolves to the next free port.
 63 | choosePort(HOST, DEFAULT_PORT)
 64 |   .then(port => {
 65 |     if (port == null) {
 66 |       // We have not found a port.
 67 |       return;
 68 |     }
 69 |     const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
 70 |     const appName = require(paths.appPackageJson).name;
 71 |     const urls = prepareUrls(protocol, HOST, port);
 72 |     // Create a webpack compiler that is configured with custom messages.
 73 |     const compiler = createCompiler({webpack, config, appName, urls, useYarn});
 74 |     // Load proxy config
 75 |     const proxySetting = require(paths.appPackageJson).proxy;
 76 |     const proxyConfig = prepareProxy(proxySetting, paths.appPublic);
 77 |     // Serve webpack assets generated by the compiler over a web sever.
 78 |     const serverConfig = createDevServerConfig(
 79 |       proxyConfig,
 80 |       urls.lanUrlForConfig
 81 |     );
 82 |     const devServer = new WebpackDevServer(compiler, serverConfig);
 83 |     // Launch WebpackDevServer.
 84 |     devServer.listen(port, HOST, err => {
 85 |       if (err) {
 86 |         return console.log(err);
 87 |       }
 88 |       if (isInteractive) {
 89 |         clearConsole();
 90 |       }
 91 |       console.log(chalk.cyan('Starting the development server...\n'));
 92 |       openBrowser(urls.localUrlForBrowser);
 93 |     });
 94 | 
 95 |     ['SIGINT', 'SIGTERM'].forEach(function(sig) {
 96 |       process.on(sig, function() {
 97 |         devServer.close();
 98 |         process.exit();
 99 |       });
100 |     });
101 |   })
102 |   .catch(err => {
103 |     if (err && err.message) {
104 |       console.log(err.message);
105 |     }
106 |     process.exit(1);
107 |   });
108 | 


--------------------------------------------------------------------------------
/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
  1 | // In production, we register a service worker to serve assets from local cache.
  2 | 
  3 | // This lets the app load faster on subsequent visits in production, and gives
  4 | // it offline capabilities. However, it also means that developers (and users)
  5 | // will only see deployed updates on the "N+1" visit to a page, since previously
  6 | // cached resources are updated in the background.
  7 | 
  8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
  9 | // This link also includes instructions on opting out of this behavior.
 10 | 
 11 | const isLocalhost = Boolean(
 12 |   window.location.hostname === 'localhost' ||
 13 |     // [::1] is the IPv6 localhost address.
 14 |     window.location.hostname === '[::1]' ||
 15 |     // 127.0.0.1/8 is considered localhost for IPv4.
 16 |     window.location.hostname.match(
 17 |       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
 18 |     )
 19 | );
 20 | 
 21 | export default function register() {
 22 |   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
 23 |     // The URL constructor is available in all browsers that support SW.
 24 |     const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
 25 |     if (publicUrl.origin !== window.location.origin) {
 26 |       // Our service worker won't work if PUBLIC_URL is on a different origin
 27 |       // from what our page is served on. This might happen if a CDN is used to
 28 |       // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
 29 |       return;
 30 |     }
 31 | 
 32 |     window.addEventListener('load', () => {
 33 |       const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
 34 | 
 35 |       if (isLocalhost) {
 36 |         // This is running on localhost. Lets check if a service worker still exists or not.
 37 |         checkValidServiceWorker(swUrl);
 38 | 
 39 |         // Add some additional logging to localhost, pointing developers to the
 40 |         // service worker/PWA documentation.
 41 |         navigator.serviceWorker.ready.then(() => {
 42 |           console.log(
 43 |             'This web app is being served cache-first by a service ' +
 44 |               'worker. To learn more, visit https://goo.gl/SC7cgQ'
 45 |           );
 46 |         });
 47 |       } else {
 48 |         // Is not local host. Just register service worker
 49 |         registerValidSW(swUrl);
 50 |       }
 51 |     });
 52 |   }
 53 | }
 54 | 
 55 | function registerValidSW(swUrl) {
 56 |   navigator.serviceWorker
 57 |     .register(swUrl)
 58 |     .then(registration => {
 59 |       registration.onupdatefound = () => {
 60 |         const installingWorker = registration.installing;
 61 |         installingWorker.onstatechange = () => {
 62 |           if (installingWorker.state === 'installed') {
 63 |             if (navigator.serviceWorker.controller) {
 64 |               // At this point, the old content will have been purged and
 65 |               // the fresh content will have been added to the cache.
 66 |               // It's the perfect time to display a "New content is
 67 |               // available; please refresh." message in your web app.
 68 |               console.log('New content is available; please refresh.');
 69 |             } else {
 70 |               // At this point, everything has been precached.
 71 |               // It's the perfect time to display a
 72 |               // "Content is cached for offline use." message.
 73 |               console.log('Content is cached for offline use.');
 74 |             }
 75 |           }
 76 |         };
 77 |       };
 78 |     })
 79 |     .catch(error => {
 80 |       console.error('Error during service worker registration:', error);
 81 |     });
 82 | }
 83 | 
 84 | function checkValidServiceWorker(swUrl) {
 85 |   // Check if the service worker can be found. If it can't reload the page.
 86 |   fetch(swUrl)
 87 |     .then(response => {
 88 |       // Ensure service worker exists, and that we really are getting a JS file.
 89 |       if (
 90 |         response.status === 404 ||
 91 |         response.headers.get('content-type').indexOf('javascript') === -1
 92 |       ) {
 93 |         // No service worker found. Probably a different app. Reload the page.
 94 |         navigator.serviceWorker.ready.then(registration => {
 95 |           registration.unregister().then(() => {
 96 |             window.location.reload();
 97 |           });
 98 |         });
 99 |       } else {
100 |         // Service worker found. Proceed as normal.
101 |         registerValidSW(swUrl);
102 |       }
103 |     })
104 |     .catch(() => {
105 |       console.log(
106 |         'No internet connection found. App is running in offline mode.'
107 |       );
108 |     });
109 | }
110 | 
111 | export function unregister() {
112 |   if ('serviceWorker' in navigator) {
113 |     navigator.serviceWorker.ready.then(registration => {
114 |       registration.unregister();
115 |     });
116 |   }
117 | }
118 | 


--------------------------------------------------------------------------------
/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 | const path = require('path');
 18 | const chalk = require('chalk');
 19 | const fs = require('fs-extra');
 20 | const webpack = require('webpack');
 21 | const config = require('../config/webpack.config.prod');
 22 | const paths = require('../config/paths');
 23 | const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
 24 | const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');
 25 | const printHostingInstructions = require('react-dev-utils/printHostingInstructions');
 26 | const FileSizeReporter = require('react-dev-utils/FileSizeReporter');
 27 | const printBuildError = require('react-dev-utils/printBuildError');
 28 | 
 29 | const measureFileSizesBeforeBuild =
 30 |   FileSizeReporter.measureFileSizesBeforeBuild;
 31 | const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild;
 32 | const useYarn = fs.existsSync(paths.yarnLockFile);
 33 | 
 34 | // These sizes are pretty large. We'll warn for bundles exceeding them.
 35 | const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024;
 36 | const WARN_AFTER_CHUNK_GZIP_SIZE = 1024 * 1024;
 37 | 
 38 | // Warn and crash if required files are missing
 39 | if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
 40 |   process.exit(1);
 41 | }
 42 | 
 43 | // First, read the current file sizes in build directory.
 44 | // This lets us display how much they changed later.
 45 | measureFileSizesBeforeBuild(paths.appBuild)
 46 |   .then(previousFileSizes => {
 47 |     // Remove all content but keep the directory so that
 48 |     // if you're in it, you don't end up in Trash
 49 |     fs.emptyDirSync(paths.appBuild);
 50 |     // Merge with the public folder
 51 |     copyPublicFolder();
 52 |     // Start the webpack build
 53 |     return build(previousFileSizes);
 54 |   })
 55 |   .then(
 56 |     ({ stats, previousFileSizes, warnings }) => {
 57 |       if (warnings.length) {
 58 |         console.log(chalk.yellow('Compiled with warnings.\n'));
 59 |         console.log(warnings.join('\n\n'));
 60 |         console.log(
 61 |           '\nSearch for the ' +
 62 |             chalk.underline(chalk.yellow('keywords')) +
 63 |             ' to learn more about each warning.'
 64 |         );
 65 |         console.log(
 66 |           'To ignore, add ' +
 67 |             chalk.cyan('// eslint-disable-next-line') +
 68 |             ' to the line before.\n'
 69 |         );
 70 |       } else {
 71 |         console.log(chalk.green('Compiled successfully.\n'));
 72 |       }
 73 | 
 74 |       console.log('File sizes after gzip:\n');
 75 |       printFileSizesAfterBuild(
 76 |         stats,
 77 |         previousFileSizes,
 78 |         paths.appBuild,
 79 |         WARN_AFTER_BUNDLE_GZIP_SIZE,
 80 |         WARN_AFTER_CHUNK_GZIP_SIZE
 81 |       );
 82 |       console.log();
 83 | 
 84 |       const appPackage = require(paths.appPackageJson);
 85 |       const publicUrl = paths.publicUrl;
 86 |       const publicPath = config.output.publicPath;
 87 |       const buildFolder = path.relative(process.cwd(), paths.appBuild);
 88 |       printHostingInstructions(
 89 |         appPackage,
 90 |         publicUrl,
 91 |         publicPath,
 92 |         buildFolder,
 93 |         useYarn
 94 |       );
 95 |     },
 96 |     err => {
 97 |       console.log(chalk.red('Failed to compile.\n'));
 98 |       printBuildError(err);
 99 |       process.exit(1);
100 |     }
101 |   );
102 | 
103 | // Create the production build and print the deployment instructions.
104 | function build(previousFileSizes) {
105 |   console.log('Creating an optimized production build...');
106 | 
107 |   let compiler = webpack(config);
108 |   return new Promise((resolve, reject) => {
109 |     compiler.run((err, stats) => {
110 |       if (err) {
111 |         return reject(err);
112 |       }
113 |       const messages = formatWebpackMessages(stats.toJson({}, true));
114 |       if (messages.errors.length) {
115 |         // Only keep the first error. Others are often indicative
116 |         // of the same problem, but confuse the reader with noise.
117 |         if (messages.errors.length > 1) {
118 |           messages.errors.length = 1;
119 |         }
120 |         return reject(new Error(messages.errors.join('\n\n')));
121 |       }
122 |       if (
123 |         process.env.CI &&
124 |         (typeof process.env.CI !== 'string' ||
125 |           process.env.CI.toLowerCase() !== 'false') &&
126 |         messages.warnings.length
127 |       ) {
128 |         console.log(
129 |           chalk.yellow(
130 |             '\nTreating warnings as errors because process.env.CI = true.\n' +
131 |               'Most CI servers set it automatically.\n'
132 |           )
133 |         );
134 |         return reject(new Error(messages.warnings.join('\n\n')));
135 |       }
136 |       return resolve({
137 |         stats,
138 |         previousFileSizes,
139 |         warnings: messages.warnings,
140 |       });
141 |     });
142 |   });
143 | }
144 | 
145 | function copyPublicFolder() {
146 |   fs.copySync(paths.appPublic, paths.appBuild, {
147 |     dereference: true,
148 |     filter: file => file !== paths.appHtml,
149 |   });
150 | }
151 | 


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


--------------------------------------------------------------------------------
/config/webpack.config.dev.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | const autoprefixer = require('autoprefixer');
  4 | const path = require('path');
  5 | const webpack = require('webpack');
  6 | const HtmlWebpackPlugin = require('html-webpack-plugin');
  7 | const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
  8 | const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
  9 | const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
 10 | const eslintFormatter = require('react-dev-utils/eslintFormatter');
 11 | const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
 12 | const getClientEnvironment = require('./env');
 13 | const paths = require('./paths');
 14 | 
 15 | // Webpack uses `publicPath` to determine where the app is being served from.
 16 | // In development, we always serve from the root. This makes config easier.
 17 | const publicPath = '/';
 18 | // `publicUrl` is just like `publicPath`, but we will provide it to our app
 19 | // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
 20 | // Omit trailing slash as %PUBLIC_PATH%/xyz looks better than %PUBLIC_PATH%xyz.
 21 | const publicUrl = '';
 22 | // Get environment variables to inject into our app.
 23 | const env = getClientEnvironment(publicUrl);
 24 | 
 25 | // This is the development configuration.
 26 | // It is focused on developer experience and fast rebuilds.
 27 | // The production configuration is different and lives in a separate file.
 28 | module.exports = {
 29 |   mode: 'development',
 30 |   // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
 31 |   // See the discussion in https://github.com/facebookincubator/create-react-app/issues/343.
 32 |   devtool: 'cheap-module-source-map',
 33 |   // These are the "entry points" to our application.
 34 |   // This means they will be the "root" imports that are included in JS bundle.
 35 |   // The first two entry points enable "hot" CSS and auto-refreshes for JS.
 36 |   entry: [
 37 |     // We ship a few polyfills by default:
 38 |     require.resolve('./polyfills'),
 39 |     // Include an alternative client for WebpackDevServer. A client's job is to
 40 |     // connect to WebpackDevServer by a socket and get notified about changes.
 41 |     // When you save a file, the client will either apply hot updates (in case
 42 |     // of CSS changes), or refresh the page (in case of JS changes). When you
 43 |     // make a syntax error, this client will display a syntax error overlay.
 44 |     // Note: instead of the default WebpackDevServer client, we use a custom one
 45 |     // to bring better experience for Create React App users. You can replace
 46 |     // the line below with these two lines if you prefer the stock client:
 47 |     // require.resolve('webpack-dev-server/client') + '?/',
 48 |     // require.resolve('webpack/hot/dev-server'),
 49 |     require.resolve('react-dev-utils/webpackHotDevClient'),
 50 |     // Finally, this is your app's code:
 51 |     paths.appIndexJs,
 52 |     // We include the app code last so that if there is a runtime error during
 53 |     // initialization, it doesn't blow up the WebpackDevServer client, and
 54 |     // changing JS code would still trigger a refresh.
 55 |   ],
 56 |   output: {
 57 |     // Add /* filename */ comments to generated require()s in the output.
 58 |     pathinfo: true,
 59 |     // This does not produce a real file. It's just the virtual path that is
 60 |     // served by WebpackDevServer in development. This is the JS bundle
 61 |     // containing code from all our entry points, and the Webpack runtime.
 62 |     filename: 'static/js/bundle.js',
 63 |     // There are also additional JS chunk files if you use code splitting.
 64 |     chunkFilename: 'static/js/[name].chunk.js',
 65 |     // This is the URL that app is served from. We use "/" in development.
 66 |     publicPath: publicPath,
 67 |     // Point sourcemap entries to original disk location (format as URL on Windows)
 68 |     devtoolModuleFilenameTemplate: info =>
 69 |       path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
 70 |   },
 71 |   resolve: {
 72 |     // This allows you to set a fallback for where Webpack should look for modules.
 73 |     // We placed these paths second because we want `node_modules` to "win"
 74 |     // if there are any conflicts. This matches Node resolution mechanism.
 75 |     // https://github.com/facebookincubator/create-react-app/issues/253
 76 |     modules: ['node_modules', paths.appNodeModules].concat(
 77 |       // It is guaranteed to exist because we tweak it in `env.js`
 78 |       process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
 79 |     ),
 80 |     // These are the reasonable defaults supported by the Node ecosystem.
 81 |     // We also include JSX as a common component filename extension to support
 82 |     // some tools, although we do not recommend using it, see:
 83 |     // https://github.com/facebookincubator/create-react-app/issues/290
 84 |     // `web` extension prefixes have been added for better support
 85 |     // for React Native Web.
 86 |     extensions: ['.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
 87 |     alias: {
 88 |       
 89 |       // Support React Native Web
 90 |       // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
 91 |       'react-native': 'react-native-web',
 92 |     },
 93 |     plugins: [
 94 |       // Prevents users from importing files from outside of src/ (or node_modules/).
 95 |       // This often causes confusion because we only process files within src/ with babel.
 96 |       // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
 97 |       // please link the files into your node_modules/ and let module-resolution kick in.
 98 |       // Make sure your source files are compiled, as they will not be processed in any way.
 99 |       new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
100 |     ],
101 |   },
102 |   module: {
103 |     strictExportPresence: true,
104 |     rules: [
105 |       // TODO: Disable require.ensure as it's not a standard language feature.
106 |       // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
107 |       // { parser: { requireEnsure: false } },
108 | 
109 |       // First, run the linter.
110 |       // It's important to do this before Babel processes the JS.
111 |       {
112 |         test: /\.(js|jsx|mjs)$/,
113 |         enforce: 'pre',
114 |         use: [
115 |           {
116 |             options: {
117 |               formatter: eslintFormatter,
118 |               eslintPath: require.resolve('eslint'),
119 |               
120 |             },
121 |             loader: require.resolve('eslint-loader'),
122 |           },
123 |         ],
124 |         include: paths.appSrc,
125 |       },
126 |       {
127 |         // "oneOf" will traverse all following loaders until one will
128 |         // match the requirements. When no loader matches it will fall
129 |         // back to the "file" loader at the end of the loader list.
130 |         oneOf: [
131 |           // "url" loader works like "file" loader except that it embeds assets
132 |           // smaller than specified limit in bytes as data URLs to avoid requests.
133 |           // A missing `test` is equivalent to a match.
134 |           {
135 |             test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
136 |             loader: require.resolve('url-loader'),
137 |             options: {
138 |               limit: 10000,
139 |               name: 'static/media/[name].[ext]',
140 |             },
141 |           },
142 |           // Process JS with Babel.
143 |           {
144 |             test: /\.(js|jsx|mjs)$/,
145 |             include: paths.appSrc,
146 |             loader: require.resolve('babel-loader'),
147 |             options: {
148 |               
149 |               // This is a feature of `babel-loader` for webpack (not Babel itself).
150 |               // It enables caching results in ./node_modules/.cache/babel-loader/
151 |               // directory for faster rebuilds.
152 |               cacheDirectory: true,
153 |             },
154 |           },
155 |           // "postcss" loader applies autoprefixer to our CSS.
156 |           // "css" loader resolves paths in CSS and adds assets as dependencies.
157 |           // "style" loader turns CSS into JS modules that inject <style> tags.
158 |           // In production, we use a plugin to extract that CSS to a file, but
159 |           // in development "style" loader enables hot editing of CSS.
160 |           {
161 |             test: /\.css$/,
162 |             use: [
163 |               require.resolve('style-loader'),
164 |               {
165 |                 loader: require.resolve('css-loader'),
166 |                 options: {
167 |                   importLoaders: 1,
168 |                 },
169 |               },
170 |               {
171 |                 loader: require.resolve('postcss-loader'),
172 |                 options: {
173 |                   // Necessary for external CSS imports to work
174 |                   // https://github.com/facebookincubator/create-react-app/issues/2677
175 |                   ident: 'postcss',
176 |                   plugins: () => [
177 |                     require('postcss-flexbugs-fixes'),
178 |                     autoprefixer({
179 |                       browsers: [
180 |                         '>1%',
181 |                         'last 4 versions',
182 |                         'Firefox ESR',
183 |                         'not ie < 9', // React doesn't support IE8 anyway
184 |                       ],
185 |                       flexbox: 'no-2009',
186 |                     }),
187 |                   ],
188 |                 },
189 |               },
190 |             ],
191 |           },
192 |           // "file" loader makes sure those assets get served by WebpackDevServer.
193 |           // When you `import` an asset, you get its (virtual) filename.
194 |           // In production, they would get copied to the `build` folder.
195 |           // This loader doesn't use a "test" so it will catch all modules
196 |           // that fall through the other loaders.
197 |           {
198 |             // Exclude `js` files to keep "css" loader working as it injects
199 |             // its runtime that would otherwise processed through "file" loader.
200 |             // Also exclude `html` and `json` extensions so they get processed
201 |             // by webpacks internal loaders.
202 |             exclude: [/\.(js|jsx|mjs)$/, /\.html$/, /\.json$/],
203 |             loader: require.resolve('file-loader'),
204 |             options: {
205 |               name: 'static/media/[name].[ext]',
206 |             },
207 |           },
208 |         ],
209 |       },
210 |       // ** STOP ** Are you adding a new loader?
211 |       // Make sure to add the new loader(s) before the "file" loader.
212 |     ],
213 |   },
214 |   plugins: [
215 |     // Makes some environment variables available in index.html.
216 |     // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
217 |     // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
218 |     // In development, this will be an empty string.
219 |     // new InterpolateHtmlPlugin(env.raw),
220 |     // Generates an `index.html` file with the <script> injected.
221 |     new HtmlWebpackPlugin({
222 |       inject: true,
223 |       template: paths.appHtml,
224 |     }),
225 |     new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
226 |     // Add module names to factory functions so they appear in browser profiler.
227 |     new webpack.NamedModulesPlugin(),
228 |     // Makes some environment variables available to the JS code, for example:
229 |     // if (process.env.NODE_ENV === 'development') { ... }. See `./env.js`.
230 |     new webpack.DefinePlugin(env.stringified),
231 |     // This is necessary to emit hot updates (currently CSS only):
232 |     new webpack.HotModuleReplacementPlugin(),
233 |     // Watcher doesn't work well if you mistype casing in a path so we use
234 |     // a plugin that prints an error when you attempt to do this.
235 |     // See https://github.com/facebookincubator/create-react-app/issues/240
236 |     new CaseSensitivePathsPlugin(),
237 |     // If you require a missing module and then `npm install` it, you still have
238 |     // to restart the development server for Webpack to discover it. This plugin
239 |     // makes the discovery automatic so you don't have to restart.
240 |     // See https://github.com/facebookincubator/create-react-app/issues/186
241 |     new WatchMissingNodeModulesPlugin(paths.appNodeModules),
242 |     // Moment.js is an extremely popular library that bundles large locale files
243 |     // by default due to how Webpack interprets its code. This is a practical
244 |     // solution that requires the user to opt into importing specific locales.
245 |     // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
246 |     // You can remove this if you don't use Moment.js:
247 |     new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
248 |   ],
249 |   // Some libraries import Node modules but don't use them in the browser.
250 |   // Tell Webpack to provide empty mocks for them so importing them works.
251 |   node: {
252 |     dgram: 'empty',
253 |     fs: 'empty',
254 |     net: 'empty',
255 |     tls: 'empty',
256 |     child_process: 'empty',
257 |   },
258 |   // Turn off performance hints during development because we don't do any
259 |   // splitting or minification in interest of speed. These warnings become
260 |   // cumbersome.
261 |   performance: {
262 |     hints: false,
263 |   },
264 | };
265 | 


--------------------------------------------------------------------------------
/config/webpack.config.prod.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | const autoprefixer = require('autoprefixer');
  4 | const path = require('path');
  5 | const webpack = require('webpack');
  6 | const HtmlWebpackPlugin = require('html-webpack-plugin');
  7 | const MiniCssExtractPlugin = require('mini-css-extract-plugin');
  8 | const ManifestPlugin = require('webpack-manifest-plugin');
  9 | const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
 10 | const SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');
 11 | const eslintFormatter = require('react-dev-utils/eslintFormatter');
 12 | const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
 13 | const paths = require('./paths');
 14 | const getClientEnvironment = require('./env');
 15 | 
 16 | // Webpack uses `publicPath` to determine where the app is being served from.
 17 | // It requires a trailing slash, or the file assets will get an incorrect path.
 18 | const publicPath = paths.servedPath;
 19 | // Some apps do not use client-side routing with pushState.
 20 | // For these, "homepage" can be set to "." to enable relative asset paths.
 21 | const shouldUseRelativeAssetPaths = publicPath === './';
 22 | // Source maps are resource heavy and can cause out of memory issue for large source files.
 23 | const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
 24 | // `publicUrl` is just like `publicPath`, but we will provide it to our app
 25 | // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
 26 | // Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
 27 | const publicUrl = publicPath.slice(0, -1);
 28 | // Get environment variables to inject into our app.
 29 | const env = getClientEnvironment(publicUrl);
 30 | 
 31 | // Assert this just to be safe.
 32 | // Development builds of React are slow and not intended for production.
 33 | if (env.stringified['process.env'].NODE_ENV !== '"production"') {
 34 |   throw new Error('Production builds must have NODE_ENV=production.');
 35 | }
 36 | 
 37 | // Note: defined here because it will be used more than once.
 38 | const cssFilename = 'static/css/[name].css';
 39 | 
 40 | // ExtractTextPlugin expects the build output to be flat.
 41 | // (See https://github.com/webpack-contrib/extract-text-webpack-plugin/issues/27)
 42 | // However, our output is structured with css, js and media folders.
 43 | // To have this structure working with relative paths, we have to use custom options.
 44 | const extractTextPluginOptions = shouldUseRelativeAssetPaths
 45 |   ? // Making sure that the publicPath goes back to to build folder.
 46 |     { publicPath: Array(cssFilename.split('/').length).join('../') }
 47 |   : {};
 48 | 
 49 | // This is the production configuration.
 50 | // It compiles slowly and is focused on producing a fast and minimal bundle.
 51 | // The development configuration is different and lives in a separate file.
 52 | module.exports = {
 53 |   mode: 'production',
 54 |   // Don't attempt to continue if there are any errors.
 55 |   bail: true,
 56 |   // We generate sourcemaps in production. This is slow but gives good results.
 57 |   // You can exclude the *.map files from the build during deployment.
 58 |   devtool: shouldUseSourceMap ? 'source-map' : false,
 59 |   // In production, we only want to load the polyfills and the app code.
 60 |   entry: {
 61 |     app: [require.resolve('./polyfills'), paths.appIndexJs],
 62 |     content: [require.resolve('./polyfills'), './src/content.js']
 63 |   },
 64 |   optimization: {
 65 |     minimize: false //Update this to true or false
 66 |   },
 67 |   output: {
 68 |     // The build folder.
 69 |     path: paths.appBuild,
 70 |     // Generated JS file names (with nested folders).
 71 |     // There will be one main bundle, and one file per asynchronous chunk.
 72 |     // We don't currently advertise code splitting but Webpack supports it.
 73 |     filename: 'static/js/[name].js',
 74 |     chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js',
 75 |     // We inferred the "public path" (such as / or /my-project) from homepage.
 76 |     publicPath: publicPath,
 77 |     // Point sourcemap entries to original disk location (format as URL on Windows)
 78 |     devtoolModuleFilenameTemplate: info =>
 79 |       path
 80 |         .relative(paths.appSrc, info.absoluteResourcePath)
 81 |         .replace(/\\/g, '/'),
 82 |   },
 83 |   resolve: {
 84 |     // This allows you to set a fallback for where Webpack should look for modules.
 85 |     // We placed these paths second because we want `node_modules` to "win"
 86 |     // if there are any conflicts. This matches Node resolution mechanism.
 87 |     // https://github.com/facebookincubator/create-react-app/issues/253
 88 |     modules: ['node_modules', paths.appNodeModules].concat(
 89 |       // It is guaranteed to exist because we tweak it in `env.js`
 90 |       process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
 91 |     ),
 92 |     // These are the reasonable defaults supported by the Node ecosystem.
 93 |     // We also include JSX as a common component filename extension to support
 94 |     // some tools, although we do not recommend using it, see:
 95 |     // https://github.com/facebookincubator/create-react-app/issues/290
 96 |     // `web` extension prefixes have been added for better support
 97 |     // for React Native Web.
 98 |     extensions: ['.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
 99 |     alias: {
100 |       
101 |       // Support React Native Web
102 |       // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
103 |       'react-native': 'react-native-web',
104 |     },
105 |     plugins: [
106 |       // Prevents users from importing files from outside of src/ (or node_modules/).
107 |       // This often causes confusion because we only process files within src/ with babel.
108 |       // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
109 |       // please link the files into your node_modules/ and let module-resolution kick in.
110 |       // Make sure your source files are compiled, as they will not be processed in any way.
111 |       new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
112 |     ],
113 |   },
114 |   module: {
115 |     strictExportPresence: true,
116 |     rules: [
117 |       // TODO: Disable require.ensure as it's not a standard language feature.
118 |       // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
119 |       // { parser: { requireEnsure: false } },
120 | 
121 |       // First, run the linter.
122 |       // It's important to do this before Babel processes the JS.
123 |       {
124 |         test: /\.(js|jsx|mjs)$/,
125 |         enforce: 'pre',
126 |         use: [
127 |           {
128 |             options: {
129 |               formatter: eslintFormatter,
130 |               eslintPath: require.resolve('eslint'),
131 |               
132 |             },
133 |             loader: require.resolve('eslint-loader'),
134 |           },
135 |         ],
136 |         include: paths.appSrc,
137 |       },
138 |       {
139 |         // "oneOf" will traverse all following loaders until one will
140 |         // match the requirements. When no loader matches it will fall
141 |         // back to the "file" loader at the end of the loader list.
142 |         oneOf: [
143 |           // "url" loader works just like "file" loader but it also embeds
144 |           // assets smaller than specified size as data URLs to avoid requests.
145 |           {
146 |             test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
147 |             loader: require.resolve('url-loader'),
148 |             options: {
149 |               limit: 10000,
150 |               name: 'static/media/[name].[ext]',
151 |             },
152 |           },
153 |           // Process JS with Babel.
154 |           {
155 |             test: /\.(js|jsx|mjs)$/,
156 |             include: paths.appSrc,
157 |             loader: require.resolve('babel-loader'),
158 |             options: {
159 |               
160 |               compact: true,
161 |             },
162 |           },
163 |           {
164 |             test: /\.s[sc]ss$/,
165 |             use: [
166 |               {loader: MiniCssExtractPlugin.loader},
167 |               require.resolve('css-loader'),
168 |               require.resolve('sass-loader')
169 |             ]
170 |           },
171 |           // The notation here is somewhat confusing.
172 |           // "postcss" loader applies autoprefixer to our CSS.
173 |           // "css" loader resolves paths in CSS and adds assets as dependencies.
174 |           // "style" loader normally turns CSS into JS modules injecting <style>,
175 |           // but unlike in development configuration, we do something different.
176 |           // `ExtractTextPlugin` first applies the "postcss" and "css" loaders
177 |           // (second argument), then grabs the result CSS and puts it into a
178 |           // separate file in our build process. This way we actually ship
179 |           // a single CSS file in production instead of JS code injecting <style>
180 |           // tags. If you use code splitting, however, any async bundles will still
181 |           // use the "style" loader inside the async code so CSS from them won't be
182 |           // in the main CSS file.
183 |           {
184 |             test: /\.css$/,
185 |             use: [{loader: MiniCssExtractPlugin.loader},'css-loader']
186 |             // loader: ExtractTextPlugin.extract(
187 |             //   Object.assign(
188 |             //     {
189 |             //       fallback: {
190 |             //         loader: require.resolve('style-loader'),
191 |             //         options: {
192 |             //           hmr: false,
193 |             //         },
194 |             //       },
195 |             //       use: [
196 |             //         {
197 |             //           loader: require.resolve('css-loader'),
198 |             //           options: {
199 |             //             importLoaders: 1,
200 |             //             minimize: true,
201 |             //             sourceMap: shouldUseSourceMap,
202 |             //           },
203 |             //         },
204 |             //         {
205 |             //           loader: require.resolve('postcss-loader'),
206 |             //           options: {
207 |             //             // Necessary for external CSS imports to work
208 |             //             // https://github.com/facebookincubator/create-react-app/issues/2677
209 |             //             ident: 'postcss',
210 |             //             plugins: () => [
211 |             //               require('postcss-flexbugs-fixes'),
212 |             //               autoprefixer({
213 |             //                 browsers: [
214 |             //                   '>1%',
215 |             //                   'last 4 versions',
216 |             //                   'Firefox ESR',
217 |             //                   'not ie < 9', // React doesn't support IE8 anyway
218 |             //                 ],
219 |             //                 flexbox: 'no-2009',
220 |             //               }),
221 |             //             ],
222 |             //           },
223 |             //         },
224 |             //       ],
225 |             //     },
226 |             //     extractTextPluginOptions
227 |             //   )
228 |             // ),
229 |             // Note: this won't work without `new ExtractTextPlugin()` in `plugins`.
230 |           },
231 |           // "file" loader makes sure assets end up in the `build` folder.
232 |           // When you `import` an asset, you get its filename.
233 |           // This loader doesn't use a "test" so it will catch all modules
234 |           // that fall through the other loaders.
235 |           {
236 |             loader: require.resolve('file-loader'),
237 |             // Exclude `js` files to keep "css" loader working as it injects
238 |             // it's runtime that would otherwise processed through "file" loader.
239 |             // Also exclude `html` and `json` extensions so they get processed
240 |             // by webpacks internal loaders.
241 |             exclude: [/\.(js|jsx|mjs)$/, /\.html$/, /\.json$/],
242 |             options: {
243 |               name: 'static/media/[name].[ext]',
244 |             },
245 |           },
246 |           // ** STOP ** Are you adding a new loader?
247 |           // Make sure to add the new loader(s) before the "file" loader.
248 |         ],
249 |       },
250 |     ],
251 |   },
252 |   plugins: [
253 |     // Makes some environment variables available in index.html.
254 |     // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
255 |     // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
256 |     // In production, it will be an empty string unless you specify "homepage"
257 |     // in `package.json`, in which case it will be the pathname of that URL.
258 |     // new InterpolateHtmlPlugin(env.raw),
259 |     // Generates an `index.html` file with the <script> injected.
260 |     new HtmlWebpackPlugin({
261 |       inject: true,
262 |       template: paths.appHtml,
263 |       minify: {
264 |         removeComments: true,
265 |         collapseWhitespace: true,
266 |         removeRedundantAttributes: true,
267 |         useShortDoctype: true,
268 |         removeEmptyAttributes: true,
269 |         removeStyleLinkTypeAttributes: true,
270 |         keepClosingSlash: true,
271 |         minifyJS: true,
272 |         minifyCSS: true,
273 |         minifyURLs: true,
274 |       },
275 |     }),
276 |     new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
277 |     // Makes some environment variables available to the JS code, for example:
278 |     // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
279 |     // It is absolutely essential that NODE_ENV was set to production here.
280 |     // Otherwise React will be compiled in the very slow development mode.
281 |     new webpack.DefinePlugin(env.stringified),
282 |     // Minify the code.
283 |     // new webpack.optimize.UglifyJsPlugin({
284 |     //   compress: {
285 |     //     warnings: false,
286 |     //     // Disabled because of an issue with Uglify breaking seemingly valid code:
287 |     //     // https://github.com/facebookincubator/create-react-app/issues/2376
288 |     //     // Pending further investigation:
289 |     //     // https://github.com/mishoo/UglifyJS2/issues/2011
290 |     //     comparisons: false,
291 |     //   },
292 |     //   mangle: {
293 |     //     safari10: true,
294 |     //   },
295 |     //   output: {
296 |     //     comments: false,
297 |     //     // Turned on because emoji and regex is not minified properly using default
298 |     //     // https://github.com/facebookincubator/create-react-app/issues/2488
299 |     //     ascii_only: true,
300 |     //   },
301 |     //   sourceMap: shouldUseSourceMap,
302 |     // }),
303 |     // Note: this won't work without ExtractTextPlugin.extract(..) in `loaders`.
304 |     new MiniCssExtractPlugin({
305 |       filename: cssFilename,
306 |     }),
307 |     // Generate a manifest file which contains a mapping of all asset filenames
308 |     // to their corresponding output file so that tools can pick it up without
309 |     // having to parse `index.html`.
310 |     new ManifestPlugin({
311 |       fileName: 'asset-manifest.json',
312 |     }),
313 |     // Generate a service worker script that will precache, and keep up to date,
314 |     // the HTML & assets that are part of the Webpack build.
315 |     new SWPrecacheWebpackPlugin({
316 |       // By default, a cache-busting query parameter is appended to requests
317 |       // used to populate the caches, to ensure the responses are fresh.
318 |       // If a URL is already hashed by Webpack, then there is no concern
319 |       // about it being stale, and the cache-busting can be skipped.
320 |       dontCacheBustUrlsMatching: /\.\w{8}\./,
321 |       filename: 'service-worker.js',
322 |       logger(message) {
323 |         if (message.indexOf('Total precache size is') === 0) {
324 |           // This message occurs for every build and is a bit too noisy.
325 |           return;
326 |         }
327 |         if (message.indexOf('Skipping static resource') === 0) {
328 |           // This message obscures real errors so we ignore it.
329 |           // https://github.com/facebookincubator/create-react-app/issues/2612
330 |           return;
331 |         }
332 |         console.log(message);
333 |       },
334 |       minify: true,
335 |       // For unknown URLs, fallback to the index page
336 |       navigateFallback: publicUrl + '/index.html',
337 |       // Ignores URLs starting from /__ (useful for Firebase):
338 |       // https://github.com/facebookincubator/create-react-app/issues/2237#issuecomment-302693219
339 |       navigateFallbackWhitelist: [/^(?!\/__).*/],
340 |       // Don't precache sourcemaps (they're large) and build asset manifest:
341 |       staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/],
342 |     }),
343 |     // Moment.js is an extremely popular library that bundles large locale files
344 |     // by default due to how Webpack interprets its code. This is a practical
345 |     // solution that requires the user to opt into importing specific locales.
346 |     // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
347 |     // You can remove this if you don't use Moment.js:
348 |     new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
349 |   ],
350 |   // Some libraries import Node modules but don't use them in the browser.
351 |   // Tell Webpack to provide empty mocks for them so importing them works.
352 |   node: {
353 |     dgram: 'empty',
354 |     fs: 'empty',
355 |     net: 'empty',
356 |     tls: 'empty',
357 |     child_process: 'empty',
358 |   },
359 | };
360 | 


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