<!DOCTYPE html>
<html>
  <head>
    <title>Playground</title>
  </head>
  <body>
    <button>A button</button>
    <textarea>A text area</textarea>
    <div id="first">First div</div>
    <div id="second">
        Second div
        <span class="inner">Inner span</span>
    </div>
  </body>
</html>