Behavior when unmounted during/after mutation

[kalijonn]

I'm trying to understand what the expected behavior is when the component is unmounted after/during a mutation.

Looks like there's a related test:
https://github.com/TanStack/query/blob/main/packages/react-query/src/__tests__/useMutation.test.tsx#L649-L667 . But there's no assertion (not sure if I'm missing something).

Current behavior is for it to reset to idle: https://codesandbox.io/p/sandbox/tq-mutation-6dhzlf

[TkDodo]

Current behavior is for it to reset to idle

Not really true. When you re-mount a component, it gets a new mutation instance that isn't tied to the previous mutation. That one is still in pending state and will eventually transition to success. You can see that in the query devtools in the mutations tab.