DOM Enlightenment Book

HTML

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>
<div style="background-color:green;border:1px solid purple;"></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 style="background-color:#fff">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 {
  background-color: red;
  border: 1px solid black;
  height: 100px;
  width: 100px;
}

JavaScript

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

//logs rgb(0, 128, 0) or green, this is an inline element style
console.log(window.getComputedStyle(div).backgroundColor);

//logs 1px solid rgb(128, 0, 128) or 1px solid purple, this is an inline element style
console.log(window.getComputedStyle(div).border);

//logs 100px, note this is not an inline element style
console.log(window.getComputedStyle(div).height);

//logs 100px, note this is not an inline element style
console.log(window.getComputedStyle(div).width);