For more information see: http://headjs.com/#theory
Simply put: It just works! (mostly)
As of version 2.0, the 6.x branch now requires Advanced CSS/JS Aggregation
Download & install the module, download the head.js library and copy it to sites/all/libraries. No further configuration is needed!
HeadJS is a plug-and-play module. Install it, adjust the optional settings and forget about it.
For bug reports and feature requests, please file an issue. Thanks!
If you want to use a script-loader but are unsure about head.js, check out LabJS.
The maintainer provides consulting services and paid development, e.g. for implementing a specific feature. Help improving the module and get in contact!