useQuery data is undefined even with initialData/placeholderData

Hey, i have a custom hook that returns a

useQuery

useQuery

that fetches the options for a select input. I have tried with both

initialData

initialData

and

placeholderData

placeholderData

set as an empty array (which typewise is not incorrect, since I can have a select without options until they are added), but the data returned is set always set as

<T | undefined>

<T | undefined>

with

being the type of the options... Does it still require me to validate if

isSuccess

isSuccess

is true in order to set the type to

even though I have set the "default data"?

- @tanstack/react-query v4.24.4
- typescript v4.9.5

TanStack•4y ago•

24 replies

dead-brown

useQuery data is undefined even with initialData/placeholderData

Hey, i have a custom hook that returns a

useQuery

useQuery

that fetches the options for a select input. I have tried with both

initialData

initialData

and

placeholderData

placeholderData

set as an empty array (which typewise is not incorrect, since I can have a select without options until they are added), but the data returned is set always set as

<T | undefined>

<T | undefined>

with

being the type of the options... Does it still require me to validate if

isSuccess

isSuccess

is true in order to set the type to

even though I have set the "default data"?

- @tanstack/react-query v4.24.4
- typescript v4.9.5

useQuery data is undefined even with initialData/placeholderData

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