JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" value="Refresh Iframe"  />
<iframe height="400" width="400" src="http://www.cnn.com" id="iframe"/>

CSS

.borders{
   border: 1px solid red;   
}

JavaScript

$(function() {

    $('input').click(function() {

        var url = "http://www.cnn.com";
        var q = new Date(); // use current date obj as query string value
        $('#iframe').prop('src', url + '?q=' + q.getTime());


    });
});