WP HeadJS

Uses HeadJS to load your enqueued scripts asynchronously, in parallel, executing them in order.

Author:Brian Zeligson (profile at wordpress.org)
WordPress version required:2.9.1
WordPress version tested:3.2.1
Plugin version:0.1
Added to WordPress repository:17-06-2012
Last updated:17-06-2012
Warning! This plugin has not been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.
Rating, %:0
Rated by:0
Plugin URI:http://github.com/beezee/wp_headjs
Total downloads:1 207
Active installs:10+
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This plugin uses the wp_print_scripts action hook, as opposed to output buffering and regex used by alternative implementations.

The downside of this method is that only scripts loaded via wp_enqueue_script will be affected by the plugin, the upside is better performance by avoiding output buffering on every page load.

The plugin will preserve any localizations added via wp_localize_script, and uses the first parameter passed to wp_enqueue_script as the label for the script in the head.js call. For example,

wp_enqueue_script('jquery', 'https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js');

would show up as

head.js({"jquery": "https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"});

This allows you to run callbacks when specific scripts are ready, such as

head.ready('jquery', function() {
    //do something when jquery is loaded
});

For more on HeadJS usage, see http://headjs.com/