JSFiddle - React, Tailwind, and code Playground

by Bryson Murray

HTML

<script src="http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.js"></script>
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/themes/ui-lightness/jquery-ui.css">
Click here to begin<br>

JavaScript

var window_focus;

$(window).focus(function() {
    window_focus = true;
})
    .blur(function() {
        window_focus = false;
    });

$(document).one('click',function() {
setInterval(function() { $('body').prepend('window has focus? ' + window_focus + '<br>' + 'document has focus? '+ document.hasFocus() + '<br>'); }, 1000);
});