const rootElem = document.getElementById("root");

​

function RandomGenerator(props) {

  const[randomNumber, setNumber] = React.useState(Math.floor(Math.random()*1000) + props.low);

  setTimeout(() => setNumber(Math.floor(Math.random()*1000) + props.low), 2000);

  return (

    <div class="container">

      <h1>Random Number Generator</h1>

      <h2>{randomNumber}</h2>

    </div>

  );

}

​

let randomElem = (

  <>

    <RandomGenerator low={500}/>

  </>

);

​

ReactDOM.createRoot(rootElem).render(randomElem);