#Watch Plugin
This plugin lets you listen for when a CSS property, or properties, changes on element. It utilizes Mutation Observers or the DOMAttrModified / propertychange events, when available, and fallsback to polling utilizing setInterval().
There is both a jQuery-specific plugin as well as a library agnostic version of this plugin available.
Original blog post can be found here
More examples can be found here
Copyright (c) 2013 Darcy Clarke
Dual licensed under the MIT and GPL licenses.