JSFiddle - React, Tailwind, and code Playground

HTML

<script>
    
    function dialog() {
        document.getElementById('result').src = "http://jsfiddle.net";
    }
    function loading() {
        alert(23);
        document.getElementById('loading').style.display = "none";
        document.getElementById('result').style.display = "block";
    }

</script>

<div id="loading">Loading</div>
<iframe  style="display:none;" id="result" onload="loading();" src="http://jsfiddle.net"/>