JSFiddle - React, Tailwind, and code Playground

by John Kiran

HTML

<html>

<head>
  <script>
    alert( "From HEAD: " + document.body ); // null, there's no <body> yet
  </script>
</head>

<body>

  <script>
    alert( "From BODY: " + document.body ); // HTMLBodyElement, now it exists
  </script>

</body>
</html>