chromium/third_party/blink/web_tests/fast/dom/Range/create-contextual-fragment.html

<p>Test of createContextualFragment. If the test succeeds you will see the word "success" below in bold.</p>
<div id="a"></div>
<script>
var r = document.createRange();
var node = document.getElementById("a");
r.selectNodeContents(node);
node.appendChild(r.createContextualFragment("<b>SUCCESS</b>"));
</script>