<!DOCTYPE html>
<html class="html">
  <head class="head">
    <meta charset=utf-8 />
    <style>
    .before:before {
      content: "before";
    }
    </style>
  </head>
  <body class="body">
    <h1>Test void elements in HTML document</h1>
    <img>
    <hr>
    <hr class="before">
    <br>
  </body>
</html>
