JSFiddle - React, Tailwind, and code Playground

HTML

<iframe src="http://fiddle.jshell.net/" id="if"> </iframe>

JavaScript

$(function () {
    var innerDoc = ($("#if")[0].contentDocument) ? $("#if")[0].contentDocument :   $("#if")[0].contentWindow.document;
    console.debug(innerDoc);
    $("#if").load( function () { 
        alert("load");
        alert(innerDoc.readyState) 
    });
    innerDoc.onreadystatechange = function () {
        alert(innerDoc.readyState) 
    };
    
    setTimeout(innerDoc.onreadystatechange, 5000);
});