useQuery same queryKey but different queryFn

[charshin]

Let's say I have one useQuery, called UQ1 with queryKey QK and queryFn QF1 in a mounted component, staleTime is set to 10s globally, UQ1 performed fetching successfully, and data got cached with QK.

Before 10s elapses, I mount another component with useQuery UQ2 with queryKey QK but queryFn QF2, I suppose it will get the cached data instead of performing another fetch with QF2, is that right?

After 10s, click away & refocus window, will both of the useQuery start a refetch or one of them only? I guess, both will be fired, and dedup will take place as in #608. Question is who will be picked first, it is not deterministic, isn't it?

I am just asking for the sake of curiosity. Thanks all

[TkDodo]

I suppose it will get the cached data instead of performing another fetch with QF2, is that right?

yes that's right.

Question is who will be picked first, it is not deterministic, isn't it?

"the first observer" will be picked, so the one that mounted first I guess. It's really not a good idea to do different Query Function for the same key!