I use knockout.js at work and like it quite a bit. But I think that I've found what you're looking for, or something close to it, in Reactive Extensions. It's a

I use knockout.js at work and like it quite a bit. But I think that I've found what you're looking for, or something close to it, in Reactive Extensions. It's a free library available for many languages including JS. With it you can compose UI interactions, promises, and other arbitrary events in an FRP-like way using observers. An example probably explains it best: http://jsfiddle.net/nmd88wum/ http://jsfiddle.net/nmd88wum/ If that piques your interest, check out: https://gist.github.com/staltz/868e7e9bc2a7b8c1f754 https://gist.github.com/staltz/868e7e9bc2a7b8c1f754