DOM Enlightenment Book

HTML

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>
<div></div>







































<h4 style="border-top:1px solid #ADADAD;padding-top:20px;margin-top:20px;"><strong>&larr; Code Example from <a href="http://www.domenlightenment.com/" target="_blank">DOM Enlightenment Book</a> by <a href="http://www.codylindley.com" target="_blank">Cody Lindley</a></strong></h4>

<p>JavaScript code is executed on page load. Click the "Run" button in the top bar to re-run the JavaScript code. All <code>console.log()'s</code> are logged to the <a href="http://getfirebug.com/firebuglite" target="_blank">Firebug Lite</a> console below &darr;.</p>

CSS

div{height:25px;width:25px;background-color:red;border:25px solid gray;padding:25px;}

JavaScript

var div = document.querySelector('div'); 

console.log(div.offsetHeight, div.offsetWidth); //logs '125 125'
//because 25px border + 25px padding + 25 content + 25 padding + 25 border = 125