How to Add Active Navigation Class Based on URL?

Posted by : Jebastin Thursday 24 April 2014

Ideally you output this class from the server side, but if you can't...

Let's say you have navigation like this:

HTML:

<nav>
<ul>
<li><a href="/">Home</a></li>
<li><a href="/about/">About</a></li>
<li><a href="/clients/">Clients</a></li>
<li><a href="/contact/">Contact Us</a></li>
</ul>
</nav>

And you are at the URL:

http://yoursite.com/about/team/

And you want the About link to get a class of "active" so you can visually indicate it's the active navigation.

jQuery:

<script type="text/javascript">
$(function () {
var page = location.pathname.split("/")[1];
if (page != "") {
$('nav a[href^="/' + page + '"]').parent().addClass('active');
}
});
</script>

JavaScript:

<script type="text/javascript">
(function() {
var nav = document.getElementById('nav'),
anchor = nav.getElementsByTagName('a'),
current = window.location.pathname.split('/')[1];
for (var i = 0; i < anchor.length; i++) {
if(anchor[i].href == current) {
anchor[i].className = "active";
}
}
})();
</script>

Essentially that will match links in the nav who's href attribute begins with "/about" (or whatever the secondary directory happens to be).

Comparison Operators: