JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://rangy.googlecode.com/svn/trunk/currentrelease/rangy-core.js"></script>
<div>
    some text
    <span> child <b> some bold</b> </span> some more text
</div>

JavaScript

var textNode =  $("span")[0].childNodes[0];
var divNode = $("div")[0];
divNode.contains(textNode);