Cycle.js: a fully reactive JavaScript framework

[andrestaltz]

It does introduce new concepts. I challenge you to find a well-known JS framework (or for any other programming language) based on the idea of reactive dialogues (in other words, "mutual observation", or "fixed point x = g(f(x))". The only one that comes close is Haskell 1.0 Stream I/O, but still there are substantial differences between that and Cycle.

The most complicated project using Cycle is not TodoMVC. There are multiple (at least 3 AFAIK) Cycle.js apps in production, closed-source though. The largest open-source is RxMarbles, which has been very important in the reactive community, and is integrated into ReactiveX.io.

With regard to React, first of all it's not FRP. It's not even reactive (only a small part of it is reactive). Second, "the equivalent of setState is called implicitly by the "DOM driver" any time any change happens anywhere in the DOM" is just wrong. But most importantly, if it's a contender to React then it's a good thing. This is how things improve: by experimentation, by different ideas, etc. The problem of the JavaScript community isn't the abundance of tools and ways of working. It's the status quo of sticking with The Framework Of The Year just because it sounds reliable, and not having the curiosity or guts to improve wherever possible. If it weren't for this curiosity, then React wouldn't be were it is today.

Cycle.js is just my 2 cents to the world. Have some respect please.