DOM Enlightenment Book

by peroli

HTML

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

body {
  margin: 0;
}

#blue {
  height: 100px;
  width: 100px;
  background-color: blue;
  border: 10px solid gray;
  padding: 25px;
  margin: 25px;
}

#red {
  height: 50px;
  width: 50px;
  background-color: red;
  border: 10px solid gray;
}

JavaScript

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

console.log(div.offsetLeft); //logs 60
console.log(div.offsetTop); //logs 60
console.log(div.offsetParent); //logs <body>