JSFiddle - React, Tailwind, and code Playground

by josh3736

HTML

<button>open</button>

JavaScript

var w;

$('button').click(function() {
    if (w) w.focus();
    else {
        w = window.open('about:blank');
        w.document.write('<button onclick="window.opener.focus();">back</button>');
    }
});