<p>This tests InsertList inside an empty div with no placeholder.  You should see an empty list item with a caret inside of it.</p>
<div id="div" contenteditable="true"></div>

<script>
var sel = window.getSelection();
var div = document.getElementById("div");
sel.setPosition(div, 0);

document.execCommand("InsertUnorderedList");
</script>