JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<head>
    
</head>

<body>
    <div id="res"></div>
    
    <iframe src="http://fiddle.jshell.net"></iframe>
    
</body>

</html>

JavaScript

console.log(Y.one('iframe').get('contentWindow').get('document').get('body').getContent());