Interesting to see many type safe functional languages compiling to javascript. Elm is another such project being a haskell-like type safe language which compiles to JS/HTML/CSS.
Other compilers for ML-family languages to Javascript:
SMLtoJS (whose site at http://www.smlserver.org/smltojs/ perhaps ironically seems to be down at the moment), which compiles the full Standard ML language (though not the full Basis library)
Looks like there are some F# options as well, though I haven't tried any and I don't know what the relationship between e.g. Websharper and Funscript is.
