Haskell to Javascript compilers?

Question

I've recently came across ghcjs haskell-to-javascript compiler, but I am not sure how "ready" it is. It seems to have little activity over the last year.

Is there an equivalent to GWT in Haskell?

Also, more of a discussion question:do you think there will be a gwt haskell equivalent? Why or why not?

Answer 1

There are several such compilers which can be used right away.

• Fay (formerly at http://fay-lang.org/, now on https://github.com/faylang/fay) The most popular and the most developed Haskell -> JS compiler. AFAIU, it implements Haskell from scratch and compiles it to JavaScript. It doesn't implement many of GHC's features, especially language extensions.
• Haste (https://github.com/valderman/haste-compiler) It uses the backend of GHC to compile to javascript. As a result you can use it to compile extension containing code.