I'm working on a babel plugin [1] that should make the migration even more gradual. At the end of the process you get both static and runtime type safety. [1]

I'm working on a babel plugin [1] that should make the migration even more gradual. At the end of the process you get both static and runtime type safety. [1] https://github.com/gcanti/babel-plugin-tcomb https://github.com/gcanti/babel-plugin-tcomb