import React from 'react';
import ReactDOM from 'react-dom/client';

ReactDOM.render(<p>Hallo</p>, document.getElementById('sandy'));

/*
For this example to work on your project,
you must have a element with
id="sandy" on your "index.html" page.
*/

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport"
      content="width=device-width, initial-scale=1" />
    <title>React App</title>
  </head>
  <body>

    <header id="sandy"></header>

  </body>
</html>