Ngoài TypeScript thì còn có các altJS khác như PureScript

TypeScript làm cho JS giống C#, PureScript làm nó giống Haskell

altJS compile-to-JavaScript language list

List of languages that compile to JS · jashkenas/coffeescript Wiki · GitHub

To fully answer “Why learn PureScript?” we must answer three other questions:

• Why one should use Javascript to build programs…
• …but not write Javascript to build it…
• …and write Purescript instead of alternatives

Nguồn:: Why Learn PureScript - PureScript: Jordan’s Reference

Intro to PureScript for TypeScript developers - Advanced Web Machinery