[virtualwhys]

Yikes, 1,670KB for generated javascript alone, that's kind of a deal breaker.

GHCJS has a ways to go methinks. Js_of_ocaml and Scala.js are far better suited for production use today as the type safety "tax" is much smaller (i.e. binary is at most 1/4 the size for equivalent functionality).

EDIT:

didn't realize you cannot yet call into Haskell from GHCJS, and even Haskell to GHCJS requires going through FFI[1]

Meh, might as well use Fay or Haste if that's the caste.

[1] http://stackoverflow.com/questions/29967135/how-to-call-hask...

[TazeTSchnitzel]

I quite like Haste for Haskell to JS compilation. Its output isn't too bloated.

[codygman]

Purescript (while not quite Haskell) also has very small output and is strict by default. There's also the very fun, informative, and productive "Purescript By Example"[0] book.

0: https://leanpub.com/purescript/read