From my point of view, there's actually no need to use Coffeescript. Coffeescript was a way to solve several JS design problems and add syntactic sugar to the language (so for any developer in Python or Ruby the language is very familiar), but with the new versions of JS its utility is small. In addition, it does not have any framework that currently offers native support.
Typescript adds a layer of extra functionality to the language and is actively used in several frameworks (such as Angular). So I prefer Typescript.
