This is supposed to be a topnav, but clearly it didn't work out.
<!DOCTYPE html>
<html>
  <body class="test">
    <h1>You can type stuff in the text box...</h1>
    <p>...and it'll appear here once you click Run!</p>
  </body>
  <script>
    var q = "test";
    console.log(q);
    //test comment
  </script>
</html>