All files App.js

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import logo from './logo.svg';
import './App.css';
import { useState } from 'react';
 
function App() {
 
  let [count, setCount] = useState(0);
  const clickOnMe = () => {
    setCount(count + 1);
  }
 
 
  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>
        <a
          className="App-link"
          href="https://reactjs.org"
          target="_blank"
          rel="noopener noreferrer"
        >
          Learn React
        </a>
      </header> */}
      <button onClick={clickOnMe}>Click me</button>
      <span data-testid="count">{count}</span>
    </div>
  );
}
 
export default App;