If you mean effects as data, I can't think of anything off top other than elm which is a language + framework. I've made my own though: https://github.com/marc

If you mean effects as data, I can't think of anything off top other than elm which is a language + framework. I've made my own though: https://github.com/marcellerusu/capable-js https://github.com/marcellerusu/capable-js. Its not for use but it was an interesting experience that enables a lot of new patterns by using generators. I don't claim that it is better than other frameworks though, there's a lot of times where this pattern is significantly more cumbersome than just using react.