exotic-emerald

Is array in query key array compared by value or reference? useQuery, v3

Would the following query key be the same?

const a = [1,2];
const b = [1,2];
useQuery(['todos', a], ...)
useQuery(['todos', b], ...)

const a = [1,2];
const b = [1,2];
useQuery(['todos', a], ...)
useQuery(['todos', b], ...)

Thank you!

3 Replies

unwilling-turquoise•3y ago

Yes

exotic-emeraldOP•3y ago

@TkDodo 🔮 Thank you! @TkDodo 🔮 https://codesandbox.io/s/hardcore-worker-t308yo?file=/src/index.js Do you know why using queryB would also update data of queryA?

exotic-emeraldOP•3y ago

Actually I found the answer, I should pass exact:true for my case, https://tanstack.com/query/v3/docs/react/guides/filters

Some methods within React Query accept a QueryFilters or MutationFilters object. Query Filters