When comparing Haste vs Babel (6to5), the Slant community recommends Babel (6to5) for most people. In the question“What are the best languages that compile to JavaScript? ” Babel (6to5) is ranked 8th while Haste is ranked 19th. The most important reason people chose Babel (6to5) is:
Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Client and Server as the same application
Haste was designed to allow both the client and server to be written as parts of the same, type-safe application. This is in stark contrast to most other options, where the client and server are considered two separate entities, resulting in extra manual validation code and more chances for type errors.
Pro Almost full power of Haskell
Haste supports the Haskell 2010 standard except for Template Haskell as well as most GHC extensions.
Pro Automatic, type safe program slicing
Haste lets you write client and server as a single program, automatically generating code for the server as well as the client, giving you full type safety even across the Internet.
Pro Generates small, reasonably performant code
Pro Support ES6(Harmony)
Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
Pro Plugins for custom features
Pro Future forward thinking
Cons
Con Lacks some minor Haskell functionality
Lacks support for Template Haskell.
Con Generated ES5 is ugly and performs badly
Output looks far from handwritten ES5, is quite large with a lot of extra statements to execute.