Echo JS 0.11.0

Your concern should be for PropTypes also, as that's only for 'dev' mode. PropTypes, TS typings and Flow props (not sure on this cause i skipped it mostly) don't do anything as in checking for a 'payload' contract/schema. Typings doesn't fix that, your code has to 'consume' and map the API response in whatever format you want considering your types/props in the code.

Mhm? :)

P.S: try this with TS: https://github.com/typestack/class-validator