DOM Enlightenment Book

HTML

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>
<div data-foo-Foo="foo" data-bar-Bar="bar"></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>

JavaScript

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

//get
console.log(elm.dataset.fooFoo); //logs 'foo'
console.log(elm.dataset.barBar); //logs 'bar'

//set
elm.dataset.goodGood="good";
console.log(elm.dataset.goodGood); //logs DOMStringMap {fooFoo="foo", barBar="bar", gooGoo="goo"}

//what the element looks like in the DOM 
console.log(elm) //logs <div data-foo-foo="foo" data-bar-bar="bar" data-goo-goo="goo">