Recompose: withState and withHandlers must go in a specific order

[jethrolarson]

I don't really know why this is true but I found if you do

compose(withHandlers(...), withState(...))

instead of

compose(withState(...), withHandlers(...))

The state props inside of the handlers will be undefined. This was confusing me for quite a while.

This is especially confusing because I expect the composed functions to run right-to-left and I wouldn't expect that the handlers would need to get added prior to the state mixin for the props to be available.

[istarkov]

https://medium.com/@icelabaratory/why-recompose-uses-compose-19e6cb1430ac

[TrySound]

@jethrolarson Think of them like from top to bottom

compose(
  withState(...),
  withHandlers(...)
)

[jethrolarson]

okay, so is this the same reason that lenses compose left-to-right?

[istarkov]

Just ordinary compose definition, having that we compose enhancers. Have no idea what lenses means. I'll close this as nothing to discuss here.