JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<head>
<meta name="viewport" content="width=device-width; initial-scale=2.0; user-scalable=0;">
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.4/jquery.mobile.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"></script>
</head>
<body>
<input id="btnsubmit" type="submit" value="test" disabled />
<script>
function loadfn () {
  document.querySelector('#btnsubmit').disabled = false;
}
</script>

<iframe width='100%' height='300px' src='//jp.wikipedia.org/' onload='loadfn()'></iframe>
</body>