JSFiddle - React, Tailwind, and code Playground

HTML

<iframe frameborder="1" src="javascript:'<div>Helllo World</div>';" style="width: 100%; height: 100%; margin: 0px; padding: 0px;position:relative;" title="hello world" id="contentIframe"></iframe>

JavaScript

$(document).ready(function () {    
       $("#contentIframe").contents().find("body").find('div').attr('title','Stuff');
});