Typescript?

[dwjohnston]

This would be a pretty good candidate for typescript.

But then, it would also be less usable for people not using typescript.

Have you thought about including it?

[rherwig]

Including typescript with the according babel preset is not that hard, so it should be fine as an "opt-in" kind of thing. I personally like typescript, but would base the decision on community feedback.

However, I can definitely see including a "migration" guide to TS in the docs.

[dwjohnston]

Well, what I was thinking was that you would/might need to then go on and define interfaces for all the things. But perhaps that isn't the case.