JSFiddle - React, Tailwind, and code Playground

HTML

<div id="ForTheiFrame" />

JavaScript

$(document).ready(function() {
    
    var StrangeIFrame = "<iframe id=\"DynamicSrc\" width=\"425\" height=\"350\" src=\"http://www.ohjelmointiputka.net\"></iframe>";
    
 $("#ForTheiFrame").append(StrangeIFrame);
    
});