Hadn't seen this before, but I've been using a library from Facebook called idx: https://github.com/facebookincubator/idx https://github.com/facebookincubator/

Hadn't seen this before, but I've been using a library from Facebook called idx: https://github.com/facebookincubator/idx https://github.com/facebookincubator/idx Idx is a bit more verbose because you have to write an arrow function for each invocation, and it doesn't support default values.