Using jQuery to check if a link is internal or external

Question

I want to write a script which can determine whether a link is internal or external. This is simple from my perspective, all internal links are relative, so they start with

Answer 1

I'm using WordPress for my CMS, and so most (if not all) of my internal links start with "http". I found a pretty interesting solution here: http://www.focal55.com/blog/jquery-tutorial-add-class-all-outbound-links-your-site

In case that site is down, it basically boils down to this selector (I modified it a bit):

$( 'a[href^="//"],a[href^="http"]' )
    .not( '[href*="' + window.location.hostname + '"]' )
;

Note that this selector will not be the fastest according to the jQuery docs.