#30 create-react-app

that's just the unchanged code from `create-react-app` cmd, cf. https://reactjs.org/docs/add-react-to-a-new-app.html
fxnn · Jan 4, 2018 · 2e870f5 · 2e870f5
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diff --git a/.gitignore b/.gitignore
@@ -6,6 +6,7 @@
 ### JetBrains template
 # For this project, we don't want to commit any IDE-specific files
 .idea
+*.iml
 
 ## File-based project format:
 *.iws

diff --git a/webapp/.eslintrc b/webapp/.eslintrc
@@ -0,0 +1,3 @@
+{
+  "extends": "react-app"
+}
diff --git a/webapp/.gitignore b/webapp/.gitignore
@@ -0,0 +1,22 @@
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
diff --git a/webapp/README.md b/webapp/README.md
diff --git a/webapp/package.json b/webapp/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "webapp",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "react": "^16.2.0",
+    "react-dom": "^16.2.0",
+    "react-scripts": "1.0.17"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test --env=jsdom",
+    "eject": "react-scripts eject"
+  }
+}
diff --git a/webapp/public/favicon.ico b/webapp/public/favicon.ico
diff --git a/webapp/public/index.html b/webapp/public/index.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <meta name="theme-color" content="#000000">
+    <!--
+      manifest.json provides metadata used when your web app is added to the
+      homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
+    <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+</head>
+<body>
+<noscript>
+    You need to enable JavaScript to run this app.
+</noscript>
+<div id="root"></div>
+<!--
+  This HTML file is a template.
+  If you open it directly in the browser, you will see an empty page.
+
+  You can add webfonts, meta tags, or analytics to this file.
+  The build step will place the bundled scripts into the <body> tag.
+
+  To begin the development, run `npm start` or `yarn start`.
+  To create a production bundle, use `npm run build` or `yarn build`.
+-->
+</body>
+</html>
diff --git a/webapp/public/manifest.json b/webapp/public/manifest.json
@@ -0,0 +1,15 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    }
+  ],
+  "start_url": "./index.html",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}
diff --git a/webapp/src/App.css b/webapp/src/App.css
@@ -0,0 +1,32 @@
+.App {
+    text-align: center;
+}
+
+.App-logo {
+    animation: App-logo-spin infinite 20s linear;
+    height: 80px;
+}
+
+.App-header {
+    background-color: #222;
+    height: 150px;
+    padding: 20px;
+    color: white;
+}
+
+.App-title {
+    font-size: 1.5em;
+}
+
+.App-intro {
+    font-size: large;
+}
+
+@keyframes App-logo-spin {
+    from {
+        transform: rotate(0deg);
+    }
+    to {
+        transform: rotate(360deg);
+    }
+}
diff --git a/webapp/src/App.js b/webapp/src/App.js
@@ -0,0 +1,21 @@
+import React, {Component} from 'react';
+import logo from './logo.svg';
+import './App.css';
+
+class App extends Component {
+    render() {
+        return (
+            <div className="App">
+                <header className="App-header">
+                    <img src={logo} className="App-logo" alt="logo"/>
+                    <h1 className="App-title">Welcome to React</h1>
+                </header>
+                <p className="App-intro">
+                    To get started, edit <code>src/App.js</code> and save to reload.
+                </p>
+            </div>
+        );
+    }
+}
+
+export default App;
diff --git a/webapp/src/App.test.js b/webapp/src/App.test.js
@@ -0,0 +1,8 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './App';
+
+it('renders without crashing', () => {
+    const div = document.createElement('div');
+    ReactDOM.render(<App/>, div);
+});
diff --git a/webapp/src/index.css b/webapp/src/index.css
@@ -0,0 +1,5 @@
+body {
+    margin: 0;
+    padding: 0;
+    font-family: sans-serif;
+}
diff --git a/webapp/src/index.js b/webapp/src/index.js
@@ -0,0 +1,8 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import registerServiceWorker from './registerServiceWorker';
+
+ReactDOM.render(<App/>, document.getElementById('root'));
+registerServiceWorker();
diff --git a/webapp/src/logo.svg b/webapp/src/logo.svg
diff --git a/webapp/src/registerServiceWorker.js b/webapp/src/registerServiceWorker.js
@@ -0,0 +1,108 @@
+// In production, we register a service worker to serve assets from local cache.
+
+// 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 the "N+1" visit to a page, since previously
+// cached resources are updated in the background.
+
+// To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
+// This link also includes instructions on opting out of this behavior.
+
+const isLocalhost = Boolean(
+    window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.1/8 is considered localhost for IPv4.
+    window.location.hostname.match(
+        /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+    )
+);
+
+export default function register() {
+    if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+        // The URL constructor is available in all browsers that support SW.
+        const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
+        if (publicUrl.origin !== window.location.origin) {
+            // Our service worker won't work if PUBLIC_URL is on a different origin
+            // from what our page is served on. This might happen if a CDN is used to
+            // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
+            return;
+        }
+
+        window.addEventListener('load', () => {
+            const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+            if (isLocalhost) {
+                // This is running on localhost. Lets check if a service worker still exists or not.
+                checkValidServiceWorker(swUrl);
+            } else {
+                // Is not local host. Just register service worker
+                registerValidSW(swUrl);
+            }
+        });
+    }
+}
+
+function registerValidSW(swUrl) {
+    navigator.serviceWorker
+        .register(swUrl)
+        .then(registration => {
+            registration.onupdatefound = () => {
+                const installingWorker = registration.installing;
+                installingWorker.onstatechange = () => {
+                    if (installingWorker.state === 'installed') {
+                        if (navigator.serviceWorker.controller) {
+                            // At this point, the old content will have been purged and
+                            // the fresh content will have been added to the cache.
+                            // It's the perfect time to display a "New content is
+                            // available; please refresh." message in your web app.
+                            console.log('New content is available; please refresh.');
+                        } 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.');
+                        }
+                    }
+                };
+            };
+        })
+        .catch(error => {
+            console.error('Error during service worker registration:', error);
+        });
+}
+
+function checkValidServiceWorker(swUrl) {
+    // Check if the service worker can be found. If it can't reload the page.
+    fetch(swUrl)
+        .then(response => {
+            // Ensure service worker exists, and that we really are getting a JS file.
+            if (
+                response.status === 404 ||
+                response.headers.get('content-type').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);
+            }
+        })
+        .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();
+        });
+    }
+}