A number of the javascript libraries distributed with WordPress are also
hosted on Google’s AJAX Libraries API.
This plugin allows your WordPress site to use the content distribution
network side of Google’s AJAX Library API, rather than serving these files from your WordPress install directly.
This provides numerous potential performance benefits:
For a more detailed look see Dave Ward’s 3 reasons why you should let
Google host jQuery for
you.
Better WordPress Minify version 1.2.2 does not yet support
protocol-relative URLs, but the next release is supposed to correct
this.
I’ve had reports of Gravity Forms breaking UGL, but I don’t have
access to Gravity Forms, so I’m not sure what’s going on. If you need
Gravity Forms you might need to disable UGL, or it might be fine, I’m
not really sure.
WP-Minify doesn’t yet support protocol-relative URLs. Add
‘//ajax.googleapis.com/’ as a JS and CSS exclusion.
I’ve had scattered reports that UGL is stepping out of the way when
using K2.
If you’re going to flag the plugin as “broken” in the WordPress Plugin
Directory, please try and let me know what is
broken.
I’m not a mind reader.
Use Google Libraries uses the following hooks (each with a priority of 1000).
Use Google Libraries compares it’s list of supported scripts to those
registered, and replaces the standard registrations src
with ones that
point to Google’s servers. Other attributes (like dependencies) are left
intact.
Use Google Libraries removes the ver=x.y.z
query string from the URL
used to load the requested library if it is going to load the library from
ajax.googleapis.com. Otherwise the URL is left unaltered. This both
improves the chances of the given URL already being cached, and prevents
script.aculo.us from including scripts multiple times.
If jQuery is enqued Use Google Libraries will inject a bit of
javascript before the next enqueued script enabling jQuery’s noConflict mode as it would
with the standard WordPress version.
Parts of this plugin (specificly, the dropping of the micro number,
which has since been removed for better caching performance) were
inspired by John Blackbourn’s
Google AJAX Libraries,
which has very similar goals to this plugin.