Blog的加速器Use Google Libraries插件

=== Use Google Libraries === Contributors: jczorkmid Donate link: http://jasonpenney.net/donate Tags: javascript, performance, CDN, Google, jQuery, Prototype, MooTools, Dojo Requires at least: 2.6 Tested up to: 2.7b3 Stable tag: 1.0 Allows your site to use common javascript libraries from Google's AJAX Libraries CDN, rather than from Wordpress's own copies. == Description == A number of the javascript libraries distributed with Wordpress are also hosted on Google's [AJAX Libraries API](http://code.google.com/apis/ajaxlibs/). 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: * increases the chance that a user already has these files cached * takes load off your server * uses compressed versions of the libraries (where available) * Google's servers are set up to negotiate HTTP compression with the requesting browser = Supported Libraries and Components = * [Dojo](http://dojotoolkit.org/) * [jQuery](http://jquery.com/) * [jQuery UI](http://ui.jquery.com/) * [MooTools](http://mootools.net/) * [Prototype](http://www.prototypejs.org/) * [script.aculo.us](http://script.aculo.us/) == Installation == # Upload the `use-google-libraries` folder to the `/wp-content/plugins/` folder. # Activate **Use Google Libraries** through the 'Plugins' menu in WordPress. # Er... That's it really. == Frequently Asked Questions == = What happens when Google updates their library versions? = Google has stated that they intend to keep every file they've hosted available indefinitely, so you shouldn't need to worry about them disappearing. This plugin loads scripts using only their major and minor versions, so if WordPress asks for jQuery 2.6.3, the plugin will load the latest 2.6.x available on Googles servers. == Technical Details == **Use Google Libraries** uses the following hooks (each with a priority of 1000). = wp_default_scripts = **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. = print_scripts_array = If jQuery is enqued **Use Google Libraries** will inject a small javascript file to ensure that it is running in [noConflict mode](http://docs.jquery.com/Core/jQuery.noConflict) as it would with the standard WordPress version. = script_loader_src = **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. == References == Parts of this plugin (specificly, the dropping of the micro number) were inspired by John Blackbourn's **[Google AJAX Libraries](http://lud.icro.us/wordpress-plugin-google-ajax-libraries/)**, which has very similar goals to this plugin.