JSFiddle - React, Tailwind, and code Playground

HTML

<iframe id="test" src="https://en.wikipedia.org/wiki/HTML_element#Frames"></iframe>
<script>
    setTimeout(function(){
      var placeholder = $("<span>");
      $("#test").load(function(){
          alert("I know the frame has loaded now");
      }).after(placeholder).detach().insertAfter(placeholder);
      placeholder.detach();
    }, 3000);
</script>