http://jscrollpane.kelvinluck.com/#usage
I believe that a Scrollbar Widget can be based on the Facebook's Chat Scrollbars. This way, we would be able to use styled scrolls on some kind of UI.
Unfortunately, short of re-implementing browser scroll bars, there is no way in the current generation of modern browsers to consistently style the scrollbars. The shadow DOM hooks for these elements are not consistently exposed. Further, each OS has its own native look-and-feel, and some OSs (iOS, OS X) are eliminating scrollbars altogether. At this time, we're not aware of a good solution for this problem. If you are aware of examples, please feel free to share! That would be very helpful.