TicTacToe/src/App.js

import './App.css';

function App() {
  return (
  <>
  <div className="board-row">
    <button className="square">1</button>
    <button className="square">2</button>
    <button className="square">3</button>
  </div>
  <div className="board-row">
    <button className="square">4</button>
    <button className="square">5</button>
    <button className="square">6</button>
  </div>
  <div className="board-row">
    <button className="square">7</button>
    <button className="square">8</button>
    <button className="square">9</button>
  </div>
  </>
  );
}

export default App;