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edit react example
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<link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
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<link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<meta name="theme-color" content="#000000" />
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<meta name="theme-color" content="#000000" />
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<meta
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<meta name="description" content="Web site created using create-react-app" />
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name="description"
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content="Web site created using create-react-app"
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/>
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<link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
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<link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
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<!--
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manifest.json provides metadata used when your web app is installed on a
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user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
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-->
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<link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
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<link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
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<!--
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Notice the use of %PUBLIC_URL% in the tags above.
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It will be replaced with the URL of the `public` folder during the build.
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Only files inside the `public` folder can be referenced from the HTML.
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Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
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work correctly both with client-side routing and a non-root public URL.
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Learn how to configure a non-root public URL by running `npm run build`.
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-->
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<title>React App</title>
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<title>React App</title>
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</head>
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</head>
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<body>
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<body>
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<noscript>You need to enable JavaScript to run this app.</noscript>
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<noscript>You need to enable JavaScript to run this app.</noscript>
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<div id="root"></div>
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<div id="root"></div>
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<!--
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This HTML file is a template.
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If you open it directly in the browser, you will see an empty page.
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You can add webfonts, meta tags, or analytics to this file.
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The build step will place the bundled scripts into the <body> tag.
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To begin the development, run `npm start` or `yarn start`.
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To create a production bundle, use `npm run build` or `yarn build`.
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-->
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</body>
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</body>
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</html>
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</html>
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import { render, screen } from '@testing-library/react';
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import App from './App';
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test('renders learn react link', () => {
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render(<App />);
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const linkElement = screen.getByText(/learn react/i);
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expect(linkElement).toBeInTheDocument();
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});
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@ -1,17 +1,11 @@
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import React from 'react';
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import React from "react";
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import ReactDOM from 'react-dom';
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import ReactDOM from "react-dom";
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import './index.css';
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import "./index.css";
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import App from './App';
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import App from "./App";
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import reportWebVitals from './reportWebVitals';
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ReactDOM.render(
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ReactDOM.render(
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<React.StrictMode>
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<React.StrictMode>
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<App />
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<App />
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</React.StrictMode>,
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</React.StrictMode>,
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document.getElementById('root')
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document.getElementById("root")
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);
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);
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// If you want to start measuring performance in your app, pass a function
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// to log results (for example: reportWebVitals(console.log))
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// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
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reportWebVitals();
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const reportWebVitals = onPerfEntry => {
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if (onPerfEntry && onPerfEntry instanceof Function) {
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import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
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getCLS(onPerfEntry);
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getFID(onPerfEntry);
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getFCP(onPerfEntry);
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getLCP(onPerfEntry);
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getTTFB(onPerfEntry);
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});
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}
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};
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export default reportWebVitals;
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// jest-dom adds custom jest matchers for asserting on DOM nodes.
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// allows you to do things like:
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// expect(element).toHaveTextContent(/react/i)
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// learn more: https://github.com/testing-library/jest-dom
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import '@testing-library/jest-dom';
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