Get your own React server
import React from 'react';
import ReactDOM from 'react-dom/client';
function Football() {
  const shoot = (a) => {
    alert(a);
  }
  return (
    <button onClick={() => shoot("Goal!")}>Take the shot!</button>
  );
}
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<Football />);
              
localhost:3000