please highlight breaking changes when migrating from v2 to v3 (( thank you )).

so far I was able to identify 1 breaking change in the lib api.

const [useStore, storeApi] = create(...)
storeApi.setState(...)

const useStore = create(...)
useStore.setState(...)

[uzairfaisal]

Actually, I’d like to highlight a breaking change. When using devtools, the set function which saves the partial object to the state would previously accept the name of the action as the 2nd param. Now, the 2nd param is changed to whether the partial object should overwrite the state or not - and any previous name param being passed to the set(...) would result in the state being overwritten in 3.x whereas this was not the behaviour in 2.x.

This is highlighted here: https://github.com/pmndrs/zustand/blob/master/src/middleware.ts#L33

Compared to what was there for 2.x: https://github.com/pmndrs/zustand/blob/f87534e444f2f48a1af89459d141660ffda855c6/src/middleware.ts

Unless I missed something already mentioned before, please highlight this as a breaking change from 2 -> 3 so it’s clear for all. This tripped our upgrade to 3.x.

[dai-shi]

That was a huge misunderstanding of mine. Thanks for noting. I added a note in v3.0.2 release which has the change. Please suggest better description if you have any. https://github.com/pmndrs/zustand/releases/tag/v3.0.2