The GHC compiles Haskell either directly to assembly or via LLVM. There is a GHCJS project, which works fine, but personally I've not used it. There's not much of a story in terms of frontend Haskell.

On the other hand, there are two "child" languages of Haskell for the job: Elm, which is a frontend-focused language, and PureScript, which compiles to JS and is designed for that use case.