gounthar · gounthar · Jun 28, 2023 · Jun 28, 2023
diff --git a/package.json b/package.json
@@ -3,14 +3,36 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
+    "@testing-library/jest-dom": "^5.16.5",
+    "@testing-library/react": "^13.4.0",
+    "@testing-library/user-event": "^13.5.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "react-scripts": "^5.0.1"
+    "react-scripts": "5.0.1",
+    "web-vitals": "^2.1.4"
   },
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
-    "test": "react-scripts test --env=jsdom",
+    "test": "react-scripts test",
     "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app",
+      "react-app/jest"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
   }
 }
diff --git a/public/index.html b/public/index.html
@@ -1,15 +1,20 @@
-<!doctype html>
+<!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">
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="Web site created using create-react-app"
+    />
+    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
     <!--
-      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/
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
     -->
-    <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
-    <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
     <!--
       Notice the use of %PUBLIC_URL% in the tags above.
       It will be replaced with the URL of the `public` folder during the build.
@@ -22,9 +27,7 @@
     <title>React App</title>
   </head>
   <body>
-    <noscript>
-      You need to enable JavaScript to run this app.
-    </noscript>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
     <div id="root"></div>
     <!--
       This HTML file is a template.

diff --git a/public/logo192.png b/public/logo192.png
diff --git a/public/logo512.png b/public/logo512.png
diff --git a/public/manifest.json b/public/manifest.json
@@ -4,11 +4,21 @@
   "icons": [
     {
       "src": "favicon.ico",
-      "sizes": "192x192",
-      "type": "image/png"
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
     }
   ],
-  "start_url": "./index.html",
+  "start_url": ".",
   "display": "standalone",
   "theme_color": "#000000",
   "background_color": "#ffffff"

diff --git a/public/robots.txt b/public/robots.txt
@@ -0,0 +1,3 @@
+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:
diff --git a/src/App.css b/src/App.css
@@ -3,26 +3,36 @@
 }
 
 .App-logo {
-  animation: App-logo-spin infinite 20s linear;
-  height: 80px;
+  height: 40vmin;
+  pointer-events: none;
 }
 
-.App-header {
-  background-color: #222;
-  height: 150px;
-  padding: 20px;
-  color: white;
+@media (prefers-reduced-motion: no-preference) {
+  .App-logo {
+    animation: App-logo-spin infinite 20s linear;
+  }
 }
 
-.App-title {
-  font-size: 1.5em;
+.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-intro {
-  font-size: large;
+.App-link {
+  color: #61dafb;
 }
 
 @keyframes App-logo-spin {
-  from { transform: rotate(0deg); }
-  to { transform: rotate(360deg); }
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
 }
diff --git a/src/App.js b/src/App.js
@@ -1,21 +1,25 @@
-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.
+function App() {
+  return (
+    <div className="App">
+      <header className="App-header">
+        <img src={logo} className="App-logo" alt="logo" />
+        <p>
+          Edit <code>src/App.js</code> and save to reload.
         </p>
-      </div>
-    );
-  }
+        <a
+          className="App-link"
+          href="https://reactjs.org"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          Learn React
+        </a>
+      </header>
+    </div>
+  );
 }
 
 export default App;
diff --git a/src/App.test.js b/src/App.test.js
@@ -1,8 +1,8 @@
-import React from 'react';
-import ReactDOM from 'react-dom';
+import { render, screen } from '@testing-library/react';
 import App from './App';
 
-it('renders without crashing', () => {
-  const div = document.createElement('div');
-  ReactDOM.render(<App />, div);
+test('renders learn react link', () => {
+  render(<App />);
+  const linkElement = screen.getByText(/learn react/i);
+  expect(linkElement).toBeInTheDocument();
 });
diff --git a/src/index.css b/src/index.css
@@ -1,5 +1,13 @@
 body {
   margin: 0;
-  padding: 0;
-  font-family: sans-serif;
+  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/src/index.js b/src/index.js
@@ -1,8 +1,17 @@
 import React from 'react';
-import ReactDOM from 'react-dom';
+import ReactDOM from 'react-dom/client';
 import './index.css';
 import App from './App';
-import registerServiceWorker from './registerServiceWorker';
+import reportWebVitals from './reportWebVitals';
 
-ReactDOM.render(<App />, document.getElementById('root'));
-registerServiceWorker();
+const root = ReactDOM.createRoot(document.getElementById('root'));
+root.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>
+);
+
+// If you want to start measuring performance in your app, pass a function
+// to log results (for example: reportWebVitals(console.log))
+// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
+reportWebVitals();
diff --git a/src/logo.svg b/src/logo.svg
diff --git a/src/registerServiceWorker.js b/src/registerServiceWorker.js
diff --git a/src/reportWebVitals.js b/src/reportWebVitals.js
@@ -0,0 +1,13 @@
+const reportWebVitals = onPerfEntry => {
+  if (onPerfEntry && onPerfEntry instanceof Function) {
+    import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
+      getCLS(onPerfEntry);
+      getFID(onPerfEntry);
+      getFCP(onPerfEntry);
+      getLCP(onPerfEntry);
+      getTTFB(onPerfEntry);
+    });
+  }
+};
+
+export default reportWebVitals;
diff --git a/src/setupTests.js b/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';