JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//tinymce.cachefly.net/4.0/tinymce.min.js"></script>
<iframe width="100%" height="300" src="https://jsfiddle.net/5f4ct5ph/5/embedded/result/" id="targetFrame"></iframe>

<button id="show">Show</button>
<button id="hide">Hide</button>

JavaScript

$(function () {
    $('#show').click(function () {
        document.getElementById('targetFrame').contentWindow.showIt();
    });
    $('#hide').click(function () {
        document.getElementById('targetFrame').contentWindow.hideIt();
    });
});