JSFiddle - React, Tailwind, and code Playground

by minitech

HTML

<iframe id="other"></iframe>

JavaScript

var other = document.getElementById('other');

window.m = [];

other.contentWindow.document.write('\
<pre><script>\
var m = parent.m;\
document.writeln(m instanceof Array);\
document.writeln(Object.prototype.toString.call(m) === "[object Array]");\
<\/script></pre>\
');