I wrote a library [1] and a babel plugin [2] (bonus point: is Flow compatible) in order to deal with those cumbersome runtime type checks. [1] https://github.c

I wrote a library [1] and a babel plugin [2] (bonus point: is Flow compatible) in order to deal with those cumbersome runtime type checks. [1] https://github.com/gcanti/tcomb https://github.com/gcanti/tcomb [2] https://github.com/gcanti/babel-plugin-tcomb https://github.com/gcanti/babel-plugin-tcomb