Improve page load performance by asynchronously loading javascript using head.js

dmikam

Async JS and CSS

Converts render-blocking CSS and JS files into NON-render-blocking, improving performance of web page.

kylereicks

Head.WP

Head.js is a script to asynchronously load and manage dependencies of javascript and CSS assets.

Brian Zeligson

WP HeadJS

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

Paris Holley

This plugin is meant to be a drop-in to your wordpress installation with no additional configuration. The goals/features of this plugin are:
<ul>
<li>Load javascript files in an asynchronous manner to improve time to DomReady/OnLoad</li>
<li>Use existing wordpress APIs for backwards compatability and prevent coupling to this plugin</li>
<li>Leverage dependency model wordpress provides for assets to improve loading performance</li>
</ul>
Please submit bugs or contributions to the github location and not here on wordpress’ system:
https://github.com/parisholley/wordpress-asynchronous-javascript/
SEO: async js, asynchronous js, async javascript
<h3>Incompatibility</h3>
This plugin will not work out the box with the following plugins (unless they are modified to support asynchronous loading).
<ul>
<li>Jetpack by WordPress.com (social plugin)</li>
<li>WP Most Popular</li>
</ul>

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