[tel]

There are a number of Haskell-to-JS compilers and Haskell-alike languages which more directly target JS. This is growing quickly but major issues remain and the toolkits are quite immature.

On the other hand, much of React is a natural play out of Haskell's sweet spot. The challenge will be in making Js-alike APIs which handle the flexibility well while maintaining sufficient typing. React-like rendering, virtualdom, data flow... this will all be incredibly naturao.

[dllthomas]

I recently had a great experience with GHCJS, although I wouldn't really say I'm using it in anger.

[tel]

I find it pleasant every time I get something working in it... but significantly far away from anything I'd like to support in production. At least for now.