Done Assignment

App.css

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+.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);
+  }
+}
+
+.head{
+
+  background-color:purple;
+  display: flex;
+  flex-direction: column;
+  align-items: start;
+
+}
+h1 {
+  margin-left: 9px;
+}
+p{
+  margin-left: 9px;
+  font-size: auto;
+
+}
+button{
+  width: 90px;
+  padding: 8px;
+  margin: 10px;
+  border-radius: 9px;
+  height: 60px;
+  background-color: #04AA6D;
+  font-size: 15px;
+}
+
+.four-columns{
+  margin-top: 35px;
+  display: flex;
+  flex-direction: row;
+  gap:1em;
+
+}
+/* .four-columns{
+display: grid;
+grid-template-columns: repeat(50, 1fr);
+} */

App.js

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+import logo from './logo.svg';
+import './App.css';
+
+function App() {
+  return (
+    <div className="App">
+    <div className='head'>
+    <h1>Say hello to <br/>ReactJS</h1>
+    <p>You will learn a Frontend framework from scratch to become an Ninka Developer</p>
+    <button>Awesome!</button>
+
+    </div>
+    <div className='four-columns'>
+       <div>
+        <img src='https://imgur.com/H2L3ohY.png'/>
+        <span>
+          <h2>Declarative</h2>
+          <p>React makes it painless to create interactive UIs.</p>
+        </span>
+       </div>
+       <div>
+        <img src='https://imgur.com/IHW1mFB.png'/>
+        <span>
+          <h2>Components</h2>
+          <p>Build encapsulates components that manage their state</p>
+        </span>
+       </div>
+       <div>
+        <img src='https://imgur.com/LtUDB9y.png'/>
+        <span>
+          <h2>Single-Way</h2>
+          <p>A set of immutable values are passed to the components</p>
+        </span>
+       </div>
+       <div>
+        <img src='https://imgur.com/agN6R4Y.png'/>
+        <span>
+          <h2>JSX</h2>
+          <p>Statically-typed designed to run on modern browsers</p>
+        </span>
+       </div>
+    </div>
+    </div>
+  );
+}
+
+export default App;

App.test.js

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+import { render, screen } from '@testing-library/react';
+import App from './App';
+
+test('renders learn react link', () => {
+  render(<App />);
+  const linkElement = screen.getByText(/learn react/i);
+  expect(linkElement).toBeInTheDocument();
+});

index.css

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+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;
+}

index.js

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+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import './index.css';
+import App from './App';
+import reportWebVitals from './reportWebVitals';
+
+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();

reportWebVitals.js

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+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;

setupTests.js

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+// 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';