AFAICT this language is less featureful than coffee-script, its only advantage being the syntax is slightly more haskellish.
 
Of course, it does provides a technique for inserting haskell values into javascript, and having javascript in haskell code. I think it would be better to add these features to the more widely used coffee script using that part of JMacro and/or Yesod's similar template tools.

The other option of course is to compile haskell into javascript using ghc [1] or llvm [2], but these solutions are still immature. The great thing about coffee-script is that the language was designed as a super-set and almost everything compiles down to very readable (easy to debug) javascript, something that is harder to do when compiling an entirely different language.
[1] https://github.com/sviperll/ghcjs
[2] code.google.com/p/emscripten/wiki/FAQ

On Tue, Jan 25, 2011 at 1:24 PM, Jeff Polakow <jeff.polakow@db.com> wrote:

Hello,

> Regarding coffee-script: I
> think having a Haskell equivalent would be an awesome tool. This could
> also be another great moment for the Haskell web community to work
> together.
>
Please have a look at jmacro.


http://haskell.org/haskellwiki/Jmacro
http://hackage.haskell.org/package/jmacro

-Jeff

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