[PEAK] Flapjax: Trellis-like JavaScript

[Phillip J. Eby]

I don't know how it handles concurrency issues, and it doesn't handle 
dependencies automatically either.  But it does use the same "things 
are either continuous values or discrete events" model, and 
automatically updates:

http://www.flapjax-lang.org/tutorial/

The mouse-follower demos are particularly amusing.  :)  The principle 
downside to the library is that it requires you to use awkward 
functional specifications of event transforms, in contrast to the 
Cells/Trellis approach of simply using the objects you care about.