<script src="../include.js"></script>
<script>
  test(() => {
    var xmlDocument = document.implementation.createDocument(null, "root", null);
    var divElement = xmlDocument.createElementNS("http://www.w3.org/1999/xhtml", "div");
    divElement.setAttribute("FoO", "bar");

    xmlDocument.documentElement.appendChild(divElement);

    println(new XMLSerializer().serializeToString(xmlDocument));
  });
</script>