W3Schools Tryit Editor

main.jsx

index.html

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

const users = [
  { id: 1, name: 'John', age: 30 },
  { id: 2, name: 'Jane', age: 25 },
  { id: 3, name: 'Bob', age: 35 }
];

function UserList() {
  return (
    <ul>
      {users.map(user => 
        <li key={user.id}>
          {user.name} is {user.age} years old
        </li>
      )}
    </ul>
  );
}

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

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