I did a fairly large Knockout app a couple of years ago and while the MVVM pattern worked pretty well after a while the interactions between all the bindings on

I did a fairly large Knockout app a couple of years ago and while the MVVM pattern worked pretty well after a while the interactions between all the bindings on the page crossed my cognitive threshold (and also ran slowly on mobile browsers). I haven't done a single page app again until a few weeks ago when I started playing with a side project. After looking at the options now available I settled on backbone + bacon.js (baconbone?). Once I got my head around functional reactive programming using the bacon.js eventstreams and properties vastly simplified my frontend code. At least for me changing the representation of the frontend from a static state to one of a stream of changes where the state is an intrinsic value of the event stream clicked. YMMV.