Making a JavaScript app with type safety guarantees. Also the pleasure of haskell in general. Same reason people use CoffeeScript. It compiles to JS, but you ge

Making a JavaScript app with type safety guarantees. Also the pleasure of haskell in general. Same reason people use CoffeeScript. It compiles to JS, but you get several advantages of not using JS directly. Either syntactical, or abstraction of idioms. Haste of course goes WAY further than CoffeeScript. But the rationale is the same. I enjoy writing Haskell much more than JS. If I can write Haskell and convert it to JS, I'll do it every time.