JSFiddle - React, Tailwind, and code Playground

HTML

Clicks: <span id="clicks" >1</span>
<iframe id="myframe" src="/" width="300" height="500">
  
</iframe>

CSS

#myframe{
  background: red;
}

JavaScript

$(function() {
    var clicks = 1;
    $('#myframe').contents().find('a').bind('click', function(e) {
        e.preventDefault();
        clicks=clicks+1;
        $('#clicks').html(clicks);
    });
});