From d1eeb1a6b3eed3c666cc6f94ba2a932abbce8515 Mon Sep 17 00:00:00 2001 From: Emiliano Ciavatta Date: Sun, 26 Apr 2020 18:01:06 +0200 Subject: Add frontend initial code --- frontend/src/App.css | 38 ++++++++++++ frontend/src/App.js | 26 ++++++++ frontend/src/App.test.js | 9 +++ frontend/src/index.css | 13 ++++ frontend/src/index.js | 17 +++++ frontend/src/logo.svg | 7 +++ frontend/src/serviceWorker.js | 141 ++++++++++++++++++++++++++++++++++++++++++ frontend/src/setupTests.js | 5 ++ 8 files changed, 256 insertions(+) create mode 100644 frontend/src/App.css create mode 100644 frontend/src/App.js create mode 100644 frontend/src/App.test.js create mode 100644 frontend/src/index.css create mode 100644 frontend/src/index.js create mode 100644 frontend/src/logo.svg create mode 100644 frontend/src/serviceWorker.js create mode 100644 frontend/src/setupTests.js (limited to 'frontend/src') diff --git a/frontend/src/App.css b/frontend/src/App.css new file mode 100644 index 0000000..74b5e05 --- /dev/null +++ b/frontend/src/App.css @@ -0,0 +1,38 @@ +.App { + text-align: center; +} + +.App-logo { + height: 40vmin; + pointer-events: none; +} + +@media (prefers-reduced-motion: no-preference) { + .App-logo { + animation: App-logo-spin infinite 20s linear; + } +} + +.App-header { + background-color: #282c34; + min-height: 100vh; + display: flex; + flex-direction: column; + align-items: center; + justify-content: center; + font-size: calc(10px + 2vmin); + color: white; +} + +.App-link { + color: #61dafb; +} + +@keyframes App-logo-spin { + from { + transform: rotate(0deg); + } + to { + transform: rotate(360deg); + } +} diff --git a/frontend/src/App.js b/frontend/src/App.js new file mode 100644 index 0000000..ce9cbd2 --- /dev/null +++ b/frontend/src/App.js @@ -0,0 +1,26 @@ +import React from 'react'; +import logo from './logo.svg'; +import './App.css'; + +function App() { + return ( +
+
+ logo +

+ Edit src/App.js and save to reload. +

+ + Learn React + +
+
+ ); +} + +export default App; diff --git a/frontend/src/App.test.js b/frontend/src/App.test.js new file mode 100644 index 0000000..4db7ebc --- /dev/null +++ b/frontend/src/App.test.js @@ -0,0 +1,9 @@ +import React from 'react'; +import { render } from '@testing-library/react'; +import App from './App'; + +test('renders learn react link', () => { + const { getByText } = render(); + const linkElement = getByText(/learn react/i); + expect(linkElement).toBeInTheDocument(); +}); diff --git a/frontend/src/index.css b/frontend/src/index.css new file mode 100644 index 0000000..ec2585e --- /dev/null +++ b/frontend/src/index.css @@ -0,0 +1,13 @@ +body { + margin: 0; + font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', + 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', + sans-serif; + -webkit-font-smoothing: antialiased; + -moz-osx-font-smoothing: grayscale; +} + +code { + font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New', + monospace; +} diff --git a/frontend/src/index.js b/frontend/src/index.js new file mode 100644 index 0000000..f5185c1 --- /dev/null +++ b/frontend/src/index.js @@ -0,0 +1,17 @@ +import React from 'react'; +import ReactDOM from 'react-dom'; +import './index.css'; +import App from './App'; +import * as serviceWorker from './serviceWorker'; + +ReactDOM.render( + + + , + document.getElementById('root') +); + +// If you want your app to work offline and load faster, you can change +// unregister() to register() below. Note this comes with some pitfalls. +// Learn more about service workers: https://bit.ly/CRA-PWA +serviceWorker.unregister(); diff --git a/frontend/src/logo.svg b/frontend/src/logo.svg new file mode 100644 index 0000000..6b60c10 --- /dev/null +++ b/frontend/src/logo.svg @@ -0,0 +1,7 @@ + + + + + + + diff --git a/frontend/src/serviceWorker.js b/frontend/src/serviceWorker.js new file mode 100644 index 0000000..b04b771 --- /dev/null +++ b/frontend/src/serviceWorker.js @@ -0,0 +1,141 @@ +// This optional code is used to register a service worker. +// register() is not called by default. + +// This lets the app load faster on subsequent visits in production, and gives +// it offline capabilities. However, it also means that developers (and users) +// will only see deployed updates on subsequent visits to a page, after all the +// existing tabs open on the page have been closed, since previously cached +// resources are updated in the background. + +// To learn more about the benefits of this model and instructions on how to +// opt-in, read https://bit.ly/CRA-PWA + +const isLocalhost = Boolean( + window.location.hostname === 'localhost' || + // [::1] is the IPv6 localhost address. + window.location.hostname === '[::1]' || + // 127.0.0.0/8 are considered localhost for IPv4. + window.location.hostname.match( + /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/ + ) +); + +export function register(config) { + if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) { + // The URL constructor is available in all browsers that support SW. + const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href); + if (publicUrl.origin !== window.location.origin) { + // Our service worker won't work if PUBLIC_URL is on a different origin + // from what our page is served on. This might happen if a CDN is used to + // serve assets; see https://github.com/facebook/create-react-app/issues/2374 + return; + } + + window.addEventListener('load', () => { + const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`; + + if (isLocalhost) { + // This is running on localhost. Let's check if a service worker still exists or not. + checkValidServiceWorker(swUrl, config); + + // Add some additional logging to localhost, pointing developers to the + // service worker/PWA documentation. + navigator.serviceWorker.ready.then(() => { + console.log( + 'This web app is being served cache-first by a service ' + + 'worker. To learn more, visit https://bit.ly/CRA-PWA' + ); + }); + } else { + // Is not localhost. Just register service worker + registerValidSW(swUrl, config); + } + }); + } +} + +function registerValidSW(swUrl, config) { + navigator.serviceWorker + .register(swUrl) + .then(registration => { + registration.onupdatefound = () => { + const installingWorker = registration.installing; + if (installingWorker == null) { + return; + } + installingWorker.onstatechange = () => { + if (installingWorker.state === 'installed') { + if (navigator.serviceWorker.controller) { + // At this point, the updated precached content has been fetched, + // but the previous service worker will still serve the older + // content until all client tabs are closed. + console.log( + 'New content is available and will be used when all ' + + 'tabs for this page are closed. See https://bit.ly/CRA-PWA.' + ); + + // Execute callback + if (config && config.onUpdate) { + config.onUpdate(registration); + } + } else { + // At this point, everything has been precached. + // It's the perfect time to display a + // "Content is cached for offline use." message. + console.log('Content is cached for offline use.'); + + // Execute callback + if (config && config.onSuccess) { + config.onSuccess(registration); + } + } + } + }; + }; + }) + .catch(error => { + console.error('Error during service worker registration:', error); + }); +} + +function checkValidServiceWorker(swUrl, config) { + // Check if the service worker can be found. If it can't reload the page. + fetch(swUrl, { + headers: { 'Service-Worker': 'script' }, + }) + .then(response => { + // Ensure service worker exists, and that we really are getting a JS file. + const contentType = response.headers.get('content-type'); + if ( + response.status === 404 || + (contentType != null && contentType.indexOf('javascript') === -1) + ) { + // No service worker found. Probably a different app. Reload the page. + navigator.serviceWorker.ready.then(registration => { + registration.unregister().then(() => { + window.location.reload(); + }); + }); + } else { + // Service worker found. Proceed as normal. + registerValidSW(swUrl, config); + } + }) + .catch(() => { + console.log( + 'No internet connection found. App is running in offline mode.' + ); + }); +} + +export function unregister() { + if ('serviceWorker' in navigator) { + navigator.serviceWorker.ready + .then(registration => { + registration.unregister(); + }) + .catch(error => { + console.error(error.message); + }); + } +} diff --git a/frontend/src/setupTests.js b/frontend/src/setupTests.js new file mode 100644 index 0000000..74b1a27 --- /dev/null +++ b/frontend/src/setupTests.js @@ -0,0 +1,5 @@ +// jest-dom adds custom jest matchers for asserting on DOM nodes. +// allows you to do things like: +// expect(element).toHaveTextContent(/react/i) +// learn more: https://github.com/testing-library/jest-dom +import '@testing-library/jest-dom/extend-expect'; -- cgit v1.2.3-70-g09d2