├── .gitignore ├── README.md ├── package.json ├── public ├── favicon.ico ├── index.html ├── logo192.png ├── logo512.png ├── manifest.json └── robots.txt ├── src ├── App.css ├── App.js ├── App.test.js ├── Chat.js ├── Container.js ├── MessageBox.js ├── UsersList.js ├── avatar.png ├── index.css ├── index.js ├── logo.svg ├── serviceWorker.js └── setupTests.js └── yarn.lock /.gitignore: -------------------------------------------------------------------------------- 1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files. 2 | 3 | # dependencies 4 | /node_modules 5 | /.pnp 6 | .pnp.js 7 | 8 | # testing 9 | /coverage 10 | 11 | # production 12 | /build 13 | 14 | # misc 15 | .DS_Store 16 | .env.local 17 | .env.development.local 18 | .env.test.local 19 | .env.production.local 20 | 21 | npm-debug.log* 22 | yarn-debug.log* 23 | yarn-error.log* 24 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app). 2 | 3 | ## Available Scripts 4 | 5 | In the project directory, you can run: 6 | 7 | ### `yarn start` 8 | 9 | Runs the app in the development mode.
10 | Open [http://localhost:3000](http://localhost:3000) to view it in the browser. 11 | 12 | The page will reload if you make edits.
13 | You will also see any lint errors in the console. 14 | 15 | ### `yarn test` 16 | 17 | Launches the test runner in the interactive watch mode.
18 | See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information. 19 | 20 | ### `yarn build` 21 | 22 | Builds the app for production to the `build` folder.
23 | It correctly bundles React in production mode and optimizes the build for the best performance. 24 | 25 | The build is minified and the filenames include the hashes.
26 | Your app is ready to be deployed! 27 | 28 | See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information. 29 | 30 | ### `yarn eject` 31 | 32 | **Note: this is a one-way operation. Once you `eject`, you can’t go back!** 33 | 34 | If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project. 35 | 36 | Instead, it will copy all the configuration files and the transitive dependencies (Webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own. 37 | 38 | You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it. 39 | 40 | ## Learn More 41 | 42 | You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started). 43 | 44 | To learn React, check out the [React documentation](https://reactjs.org/). 45 | 46 | ### Code Splitting 47 | 48 | This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting 49 | 50 | ### Analyzing the Bundle Size 51 | 52 | This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size 53 | 54 | ### Making a Progressive Web App 55 | 56 | This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app 57 | 58 | ### Advanced Configuration 59 | 60 | This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration 61 | 62 | ### Deployment 63 | 64 | This section has moved here: https://facebook.github.io/create-react-app/docs/deployment 65 | 66 | ### `yarn build` fails to minify 67 | 68 | This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify 69 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "simple-webrtc-chat-app", 3 | "version": "0.1.0", 4 | "private": true, 5 | "dependencies": { 6 | "@testing-library/jest-dom": "^4.2.4", 7 | "@testing-library/react": "^9.3.2", 8 | "@testing-library/user-event": "^7.1.2", 9 | "date-fns": "^2.9.0", 10 | "react": "^16.12.0", 11 | "react-bootstrap-sweetalert": "^5.1.9", 12 | "react-dom": "^16.12.0", 13 | "react-scripts": "3.3.0", 14 | "semantic-ui-css": "^2.4.1", 15 | "semantic-ui-react": "^0.88.2" 16 | }, 17 | "scripts": { 18 | "start": "react-scripts start", 19 | "build": "react-scripts build", 20 | "test": "react-scripts test", 21 | "eject": "react-scripts eject" 22 | }, 23 | "eslintConfig": { 24 | "extends": "react-app" 25 | }, 26 | "browserslist": { 27 | "production": [ 28 | ">0.2%", 29 | "not dead", 30 | "not op_mini all" 31 | ], 32 | "development": [ 33 | "last 1 chrome version", 34 | "last 1 firefox version", 35 | "last 1 safari version" 36 | ] 37 | } 38 | } 39 | -------------------------------------------------------------------------------- /public/favicon.ico: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jkithome/simple-webrtc-chat-app/43a75a60e4b18507cc68f2647a1aac84f94c2774/public/favicon.ico -------------------------------------------------------------------------------- /public/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 12 | 13 | 17 | 18 | 27 | 28 | React App 29 | 30 | 31 | 32 |
33 | 43 | 44 | 45 | -------------------------------------------------------------------------------- /public/logo192.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jkithome/simple-webrtc-chat-app/43a75a60e4b18507cc68f2647a1aac84f94c2774/public/logo192.png -------------------------------------------------------------------------------- /public/logo512.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jkithome/simple-webrtc-chat-app/43a75a60e4b18507cc68f2647a1aac84f94c2774/public/logo512.png -------------------------------------------------------------------------------- /public/manifest.json: -------------------------------------------------------------------------------- 1 | { 2 | "short_name": "React App", 3 | "name": "Create React App Sample", 4 | "icons": [ 5 | { 6 | "src": "favicon.ico", 7 | "sizes": "64x64 32x32 24x24 16x16", 8 | "type": "image/x-icon" 9 | }, 10 | { 11 | "src": "logo192.png", 12 | "type": "image/png", 13 | "sizes": "192x192" 14 | }, 15 | { 16 | "src": "logo512.png", 17 | "type": "image/png", 18 | "sizes": "512x512" 19 | } 20 | ], 21 | "start_url": ".", 22 | "display": "standalone", 23 | "theme_color": "#000000", 24 | "background_color": "#ffffff" 25 | } 26 | -------------------------------------------------------------------------------- /public/robots.txt: -------------------------------------------------------------------------------- 1 | # https://www.robotstxt.org/robotstxt.html 2 | User-agent: * 3 | -------------------------------------------------------------------------------- /src/App.css: -------------------------------------------------------------------------------- 1 | .App { 2 | text-align: center; 3 | padding: 20px; 4 | } 5 | 6 | .App-logo { 7 | height: 40vmin; 8 | pointer-events: none; 9 | } 10 | 11 | @media (prefers-reduced-motion: no-preference) { 12 | .App-logo { 13 | animation: App-logo-spin infinite 20s linear; 14 | } 15 | } 16 | 17 | .App-header { 18 | background-color: #282c34; 19 | min-height: 100vh; 20 | display: flex; 21 | flex-direction: column; 22 | align-items: center; 23 | justify-content: center; 24 | font-size: calc(10px + 2vmin); 25 | color: white; 26 | } 27 | 28 | .App-link { 29 | color: #61dafb; 30 | } 31 | 32 | @keyframes App-logo-spin { 33 | from { 34 | transform: rotate(0deg); 35 | } 36 | to { 37 | transform: rotate(360deg); 38 | } 39 | } 40 | -------------------------------------------------------------------------------- /src/App.js: -------------------------------------------------------------------------------- 1 | import React, { useState, createContext } from "react"; 2 | import Container from "./Container"; 3 | 4 | 5 | const ConnectionContext = createContext({ 6 | connection: null, 7 | updateConnection: () => {} 8 | }); 9 | const ChannelContext = createContext({ 10 | channel: null, 11 | updateChannel: () => {} 12 | }); 13 | 14 | const App = () => { 15 | const [connection, setconnection] = useState(null); 16 | const [channel, setChannel] = useState(null); 17 | const updateConnection = conn => { 18 | setconnection(conn); 19 | }; 20 | const updateChannel = chn => { 21 | setChannel(chn); 22 | }; 23 | return ( 24 | 25 | 26 | 27 | 28 | 29 | ); 30 | }; 31 | 32 | export const ConnectionConsumer = ConnectionContext.Consumer 33 | export const ChannelConsumer = ChannelContext.Consumer 34 | export default App; 35 | -------------------------------------------------------------------------------- /src/App.test.js: -------------------------------------------------------------------------------- 1 | import React from 'react'; 2 | import { render } from '@testing-library/react'; 3 | import App from './App'; 4 | 5 | test('renders learn react link', () => { 6 | const { getByText } = render(); 7 | const linkElement = getByText(/learn react/i); 8 | expect(linkElement).toBeInTheDocument(); 9 | }); 10 | -------------------------------------------------------------------------------- /src/Chat.js: -------------------------------------------------------------------------------- 1 | import React, { Fragment, useState, useEffect, useRef } from "react"; 2 | import { 3 | Header, 4 | Icon, 5 | Input, 6 | Grid, 7 | Segment, 8 | Button, 9 | Loader 10 | } from "semantic-ui-react"; 11 | import SweetAlert from "react-bootstrap-sweetalert"; 12 | import { format } from "date-fns"; 13 | import "./App.css"; 14 | import UsersList from "./UsersList"; 15 | import MessageBox from "./MessageBox"; 16 | 17 | // Use for remote connections 18 | const configuration = { 19 | iceServers: [{ url: "stun:stun.1.google.com:19302" }] 20 | }; 21 | 22 | // Use for local connections 23 | // const configuration = null; 24 | 25 | const Chat = ({ connection, updateConnection, channel, updateChannel }) => { 26 | const [socketOpen, setSocketOpen] = useState(false); 27 | const [socketMessages, setSocketMessages] = useState([]); 28 | const [isLoggedIn, setIsLoggedIn] = useState(false); 29 | const [name, setName] = useState(""); 30 | const [loggingIn, setLoggingIn] = useState(false); 31 | const [users, setUsers] = useState([]); 32 | const [connectedTo, setConnectedTo] = useState(""); 33 | const [connecting, setConnecting] = useState(false); 34 | const [alert, setAlert] = useState(null); 35 | const connectedRef = useRef(); 36 | const webSocket = useRef(null); 37 | const [message, setMessage] = useState(""); 38 | const messagesRef = useRef({}); 39 | const [messages, setMessages] = useState({}); 40 | 41 | useEffect(() => { 42 | webSocket.current = new WebSocket(process.env.REACT_APP_WEBSOCKET_URL); 43 | webSocket.current.onmessage = message => { 44 | const data = JSON.parse(message.data); 45 | setSocketMessages(prev => [...prev, data]); 46 | }; 47 | webSocket.current.onclose = () => { 48 | webSocket.current.close(); 49 | }; 50 | return () => webSocket.current.close(); 51 | }, []); 52 | 53 | useEffect(() => { 54 | let data = socketMessages.pop(); 55 | if (data) { 56 | switch (data.type) { 57 | case "connect": 58 | setSocketOpen(true); 59 | break; 60 | case "login": 61 | onLogin(data); 62 | break; 63 | case "updateUsers": 64 | updateUsersList(data); 65 | break; 66 | case "removeUser": 67 | removeUser(data); 68 | break; 69 | case "offer": 70 | onOffer(data); 71 | break; 72 | case "answer": 73 | onAnswer(data); 74 | break; 75 | case "candidate": 76 | onCandidate(data); 77 | break; 78 | default: 79 | break; 80 | } 81 | } 82 | }, [socketMessages]); 83 | 84 | const closeAlert = () => { 85 | setAlert(null); 86 | }; 87 | 88 | const send = data => { 89 | webSocket.current.send(JSON.stringify(data)); 90 | }; 91 | 92 | const handleLogin = () => { 93 | setLoggingIn(true); 94 | send({ 95 | type: "login", 96 | name 97 | }); 98 | }; 99 | 100 | const updateUsersList = ({ user }) => { 101 | setUsers(prev => [...prev, user]); 102 | }; 103 | 104 | const removeUser = ({ user }) => { 105 | setUsers(prev => prev.filter(u => u.userName !== user.userName)); 106 | } 107 | 108 | const handleDataChannelMessageReceived = ({ data }) => { 109 | const message = JSON.parse(data); 110 | const { name: user } = message; 111 | let messages = messagesRef.current; 112 | let userMessages = messages[user]; 113 | if (userMessages) { 114 | userMessages = [...userMessages, message]; 115 | let newMessages = Object.assign({}, messages, { [user]: userMessages }); 116 | messagesRef.current = newMessages; 117 | setMessages(newMessages); 118 | } else { 119 | let newMessages = Object.assign({}, messages, { [user]: [message] }); 120 | messagesRef.current = newMessages; 121 | setMessages(newMessages); 122 | } 123 | }; 124 | 125 | const onLogin = ({ success, message, users: loggedIn }) => { 126 | setLoggingIn(false); 127 | if (success) { 128 | setAlert( 129 | 135 | Logged in successfully! 136 | 137 | ); 138 | setIsLoggedIn(true); 139 | setUsers(loggedIn); 140 | let localConnection = new RTCPeerConnection(configuration); 141 | //when the browser finds an ice candidate we send it to another peer 142 | localConnection.onicecandidate = ({ candidate }) => { 143 | let connectedTo = connectedRef.current; 144 | 145 | if (candidate && !!connectedTo) { 146 | send({ 147 | name: connectedTo, 148 | type: "candidate", 149 | candidate 150 | }); 151 | } 152 | }; 153 | localConnection.ondatachannel = event => { 154 | console.log("Data channel is created!"); 155 | let receiveChannel = event.channel; 156 | receiveChannel.onopen = () => { 157 | console.log("Data channel is open and ready to be used."); 158 | }; 159 | receiveChannel.onmessage = handleDataChannelMessageReceived; 160 | updateChannel(receiveChannel); 161 | }; 162 | updateConnection(localConnection); 163 | } else { 164 | setAlert( 165 | 172 | {message} 173 | 174 | ); 175 | } 176 | }; 177 | 178 | //when somebody wants to message us 179 | const onOffer = ({ offer, name }) => { 180 | setConnectedTo(name); 181 | connectedRef.current = name; 182 | 183 | connection 184 | .setRemoteDescription(new RTCSessionDescription(offer)) 185 | .then(() => connection.createAnswer()) 186 | .then(answer => connection.setLocalDescription(answer)) 187 | .then(() => 188 | send({ type: "answer", answer: connection.localDescription, name }) 189 | ) 190 | .catch(e => { 191 | console.log({ e }); 192 | setAlert( 193 | 200 | An error has occurred. 201 | 202 | ); 203 | }); 204 | }; 205 | 206 | //when another user answers to our offer 207 | const onAnswer = ({ answer }) => { 208 | connection.setRemoteDescription(new RTCSessionDescription(answer)); 209 | }; 210 | 211 | //when we got ice candidate from another user 212 | const onCandidate = ({ candidate }) => { 213 | connection.addIceCandidate(new RTCIceCandidate(candidate)); 214 | }; 215 | 216 | //when a user clicks the send message button 217 | const sendMsg = () => { 218 | const time = format(new Date(), "yyyy-MM-dd'T'HH:mm:ss.SSSxxx"); 219 | let text = { time, message, name }; 220 | let messages = messagesRef.current; 221 | let connectedTo = connectedRef.current; 222 | let userMessages = messages[connectedTo]; 223 | if (messages[connectedTo]) { 224 | userMessages = [...userMessages, text]; 225 | let newMessages = Object.assign({}, messages, { 226 | [connectedTo]: userMessages 227 | }); 228 | messagesRef.current = newMessages; 229 | setMessages(newMessages); 230 | } else { 231 | userMessages = Object.assign({}, messages, { [connectedTo]: [text] }); 232 | messagesRef.current = userMessages; 233 | setMessages(userMessages); 234 | } 235 | channel.send(JSON.stringify(text)); 236 | setMessage(""); 237 | }; 238 | 239 | const handleConnection = name => { 240 | var dataChannelOptions = { 241 | reliable: true 242 | }; 243 | 244 | let dataChannel = connection.createDataChannel("messenger"); 245 | 246 | dataChannel.onerror = error => { 247 | setAlert( 248 | 255 | An error has occurred. 256 | 257 | ); 258 | }; 259 | 260 | dataChannel.onmessage = handleDataChannelMessageReceived; 261 | updateChannel(dataChannel); 262 | 263 | connection 264 | .createOffer() 265 | .then(offer => connection.setLocalDescription(offer)) 266 | .then(() => 267 | send({ type: "offer", offer: connection.localDescription, name }) 268 | ) 269 | .catch(e => 270 | setAlert( 271 | 278 | An error has occurred. 279 | 280 | ) 281 | ); 282 | }; 283 | 284 | const toggleConnection = userName => { 285 | if (connectedRef.current === userName) { 286 | setConnecting(true); 287 | setConnectedTo(""); 288 | connectedRef.current = ""; 289 | setConnecting(false); 290 | } else { 291 | setConnecting(true); 292 | setConnectedTo(userName); 293 | connectedRef.current = userName; 294 | handleConnection(userName); 295 | setConnecting(false); 296 | } 297 | }; 298 | return ( 299 |
300 | {alert} 301 |
302 | 303 | Simple WebRTC Chap App 304 |
305 | {(socketOpen && ( 306 | 307 | 308 | 309 | {(!isLoggedIn && ( 310 | setName(e.target.value)} 315 | placeholder="Username..." 316 | action 317 | > 318 | 319 | 327 | 328 | )) || ( 329 | 330 | Logged In as: {name} 331 | 332 | )} 333 | 334 | 335 | 336 | 342 | 350 | 351 | 352 | )) || ( 353 | 354 | Loading 355 | 356 | )} 357 |
358 | ); 359 | }; 360 | 361 | export default Chat; 362 | -------------------------------------------------------------------------------- /src/Container.js: -------------------------------------------------------------------------------- 1 | import React from "react"; 2 | import Chat from "./Chat"; 3 | import { ConnectionConsumer, ChannelConsumer} from "./App"; 4 | 5 | const Container = () => { 6 | return ( 7 | 8 | {({ connection, updateConnection }) => ( 9 | 10 | {({ channel, updateChannel }) => ( 11 | 17 | )} 18 | 19 | )} 20 | 21 | ); 22 | }; 23 | 24 | export default Container -------------------------------------------------------------------------------- /src/MessageBox.js: -------------------------------------------------------------------------------- 1 | import React from "react"; 2 | import { 3 | Header, 4 | Icon, 5 | Input, 6 | Grid, 7 | Segment, 8 | Card, 9 | Sticky, 10 | Button, 11 | Comment 12 | } from "semantic-ui-react"; 13 | import { formatRelative } from "date-fns"; 14 | import avatar from "./avatar.png"; 15 | 16 | const MessageBox = ({ messages, connectedTo, message, setMessage, sendMsg, name }) => { 17 | return ( 18 | 19 | 20 | 21 | 26 | 27 | {!!connectedTo && messages[connectedTo] ? ( 28 | 29 | {messages[connectedTo].map(({ name: sender, message: text, time }) => ( 30 | 31 | 32 | 33 | {sender === name ? 'You' : sender} 34 | 35 | 36 | {formatRelative(new Date(time), new Date())} 37 | 38 | 39 | {text} 40 | 41 | 42 | ))} 43 | 44 | ) : ( 45 | 46 |
47 | 48 | No messages available yet 49 |
50 |
51 | )} 52 | setMessage(e.target.value)} 57 | placeholder="Type message" 58 | action 59 | > 60 | 61 | 65 | 66 |
67 |
68 |
69 |
70 | ); 71 | }; 72 | 73 | export default MessageBox; 74 | -------------------------------------------------------------------------------- /src/UsersList.js: -------------------------------------------------------------------------------- 1 | import React from "react"; 2 | import { 3 | Grid, 4 | Segment, 5 | Card, 6 | List, 7 | Button, 8 | Image, 9 | } from "semantic-ui-react"; 10 | import avatar from "./avatar.png"; 11 | 12 | const UsersList = ({ users, toggleConnection, connectedTo, connecting }) => { 13 | return ( 14 | 15 | 16 | 17 | 18 | {(users.length && ( 19 | 20 | {users.map(({ userName }) => ( 21 | 22 | 23 | 32 | 33 | 34 | 35 | {userName} 36 | 37 | 38 | ))} 39 | 40 | )) || There are no users Online} 41 | 42 | 43 | 44 | ); 45 | }; 46 | 47 | export default UsersList; 48 | -------------------------------------------------------------------------------- /src/avatar.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jkithome/simple-webrtc-chat-app/43a75a60e4b18507cc68f2647a1aac84f94c2774/src/avatar.png -------------------------------------------------------------------------------- /src/index.css: -------------------------------------------------------------------------------- 1 | body { 2 | margin: 0; 3 | font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 4 | 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', 5 | sans-serif; 6 | -webkit-font-smoothing: antialiased; 7 | -moz-osx-font-smoothing: grayscale; 8 | } 9 | 10 | code { 11 | font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New', 12 | monospace; 13 | } 14 | -------------------------------------------------------------------------------- /src/index.js: -------------------------------------------------------------------------------- 1 | import 'semantic-ui-css/semantic.min.css' 2 | import React from 'react'; 3 | import ReactDOM from 'react-dom'; 4 | import './index.css'; 5 | import App from './App'; 6 | import * as serviceWorker from './serviceWorker'; 7 | 8 | ReactDOM.render(, document.getElementById('root')); 9 | 10 | // If you want your app to work offline and load faster, you can change 11 | // unregister() to register() below. Note this comes with some pitfalls. 12 | // Learn more about service workers: https://bit.ly/CRA-PWA 13 | serviceWorker.unregister(); 14 | -------------------------------------------------------------------------------- /src/logo.svg: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /src/serviceWorker.js: -------------------------------------------------------------------------------- 1 | // This optional code is used to register a service worker. 2 | // register() is not called by default. 3 | 4 | // This lets the app load faster on subsequent visits in production, and gives 5 | // it offline capabilities. However, it also means that developers (and users) 6 | // will only see deployed updates on subsequent visits to a page, after all the 7 | // existing tabs open on the page have been closed, since previously cached 8 | // resources are updated in the background. 9 | 10 | // To learn more about the benefits of this model and instructions on how to 11 | // opt-in, read https://bit.ly/CRA-PWA 12 | 13 | const isLocalhost = Boolean( 14 | window.location.hostname === 'localhost' || 15 | // [::1] is the IPv6 localhost address. 16 | window.location.hostname === '[::1]' || 17 | // 127.0.0.0/8 are considered localhost for IPv4. 18 | window.location.hostname.match( 19 | /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/ 20 | ) 21 | ); 22 | 23 | export function register(config) { 24 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) { 25 | // The URL constructor is available in all browsers that support SW. 26 | const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href); 27 | if (publicUrl.origin !== window.location.origin) { 28 | // Our service worker won't work if PUBLIC_URL is on a different origin 29 | // from what our page is served on. This might happen if a CDN is used to 30 | // serve assets; see https://github.com/facebook/create-react-app/issues/2374 31 | return; 32 | } 33 | 34 | window.addEventListener('load', () => { 35 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`; 36 | 37 | if (isLocalhost) { 38 | // This is running on localhost. Let's check if a service worker still exists or not. 39 | checkValidServiceWorker(swUrl, config); 40 | 41 | // Add some additional logging to localhost, pointing developers to the 42 | // service worker/PWA documentation. 43 | navigator.serviceWorker.ready.then(() => { 44 | console.log( 45 | 'This web app is being served cache-first by a service ' + 46 | 'worker. To learn more, visit https://bit.ly/CRA-PWA' 47 | ); 48 | }); 49 | } else { 50 | // Is not localhost. Just register service worker 51 | registerValidSW(swUrl, config); 52 | } 53 | }); 54 | } 55 | } 56 | 57 | function registerValidSW(swUrl, config) { 58 | navigator.serviceWorker 59 | .register(swUrl) 60 | .then(registration => { 61 | registration.onupdatefound = () => { 62 | const installingWorker = registration.installing; 63 | if (installingWorker == null) { 64 | return; 65 | } 66 | installingWorker.onstatechange = () => { 67 | if (installingWorker.state === 'installed') { 68 | if (navigator.serviceWorker.controller) { 69 | // At this point, the updated precached content has been fetched, 70 | // but the previous service worker will still serve the older 71 | // content until all client tabs are closed. 72 | console.log( 73 | 'New content is available and will be used when all ' + 74 | 'tabs for this page are closed. See https://bit.ly/CRA-PWA.' 75 | ); 76 | 77 | // Execute callback 78 | if (config && config.onUpdate) { 79 | config.onUpdate(registration); 80 | } 81 | } else { 82 | // At this point, everything has been precached. 83 | // It's the perfect time to display a 84 | // "Content is cached for offline use." message. 85 | console.log('Content is cached for offline use.'); 86 | 87 | // Execute callback 88 | if (config && config.onSuccess) { 89 | config.onSuccess(registration); 90 | } 91 | } 92 | } 93 | }; 94 | }; 95 | }) 96 | .catch(error => { 97 | console.error('Error during service worker registration:', error); 98 | }); 99 | } 100 | 101 | function checkValidServiceWorker(swUrl, config) { 102 | // Check if the service worker can be found. If it can't reload the page. 103 | fetch(swUrl, { 104 | headers: { 'Service-Worker': 'script' } 105 | }) 106 | .then(response => { 107 | // Ensure service worker exists, and that we really are getting a JS file. 108 | const contentType = response.headers.get('content-type'); 109 | if ( 110 | response.status === 404 || 111 | (contentType != null && contentType.indexOf('javascript') === -1) 112 | ) { 113 | // No service worker found. Probably a different app. Reload the page. 114 | navigator.serviceWorker.ready.then(registration => { 115 | registration.unregister().then(() => { 116 | window.location.reload(); 117 | }); 118 | }); 119 | } else { 120 | // Service worker found. Proceed as normal. 121 | registerValidSW(swUrl, config); 122 | } 123 | }) 124 | .catch(() => { 125 | console.log( 126 | 'No internet connection found. App is running in offline mode.' 127 | ); 128 | }); 129 | } 130 | 131 | export function unregister() { 132 | if ('serviceWorker' in navigator) { 133 | navigator.serviceWorker.ready.then(registration => { 134 | registration.unregister(); 135 | }); 136 | } 137 | } 138 | -------------------------------------------------------------------------------- /src/setupTests.js: -------------------------------------------------------------------------------- 1 | // jest-dom adds custom jest matchers for asserting on DOM nodes. 2 | // allows you to do things like: 3 | // expect(element).toHaveTextContent(/react/i) 4 | // learn more: https://github.com/testing-library/jest-dom 5 | import '@testing-library/jest-dom/extend-expect'; 6 | --------------------------------------------------------------------------------