where to put script tag in react code example

Example 1: react insert script tag

useEffect(() => {
  const script = document.createElement('script');

  script.src = "https://use.typekit.net/foobar.js";
  script.async = true;

  document.body.appendChild(script);

  return () => {
    document.body.removeChild(script);
  }
}, []);

Example 2: react script tag for html

<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>