W3Schools Tryit Editor

main.jsx

index.html

import { createRoot } from 'react-dom/client'

function MyCars() {
  const cars = ['Ford', 'BMW', 'Audi'];
  return (
    <>
      <h1>My Cars:</h1>
      <ul>
        {cars.map((car, index) => <li key={index}>I am a { car }</li>)}
      </ul>
    </>
  );
}

createRoot(document.getElementById('root')).render(
  <MyCars />
);

<!doctype html>
<html lang="en">
  <body>
    <div id="root"></div>
    <script type="module" src="/src/main.jsx"></script>
  </body>
</html>