<!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <svg xmlns="http://www.w3.org/2000/svg" version="1.1" onload="handleLoad(evt);"> <title>Testcase for accessing null rootContent</title> <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=365611 --> <script type="application/ecmascript"> <![CDATA[ function handleLoad(event) { var root = document.removeChild(document.documentElement); if (document.documentElement == null) { // this shouldn't crash document.appendChild(root); document.getElementById('rect').setAttribute('fill', 'lime'); } } ]]> </script> <rect id="rect" width="100%" height="100%" fill="red"/> </svg>