useSuspenseQuery ignores staleTime functions

[afdca]

Describe the bug

useSuspenseQuery ignores the staleTime config parameter when it is a function instead of a number.

// staleTime number - ✅ works
useSuspenseQuery({
  staleTime: Infinity,
  // ...
})

// staleTime function - ❌ does not work: staleTime value defaults to a value of 1 second instead
useSuspenseQuery({
  staleTime: () => Infinity,
  // ...
})

Your minimal, reproducible example

https://codesandbox.io/p/github/afdca/tanstack-query-suspense-staletime/master

Steps to reproduce

• open the demo link, then open the Tanstack query devtools in the demo
• notice the staleTime function query goes stale after 1 second
• notice the staleTime number query never goes stale
• notice how both queries are set up in the code:

  useSuspenseQuery({
    queryFn: () => true,
    queryKey: ["staleTime function"],
    staleTime: () => Infinity, // Function
  })

  useSuspenseQuery({
    queryFn: () => true,
    queryKey: ["staleTime number"],
    staleTime: Infinity, // Number
  })

Expected behavior

useSuspenseQuery should not ignore the staleTime config parameter when it is a function.

How often does this bug happen?

Every time

Screenshots or Videos

No response

Platform

• OS - Windows 11
• Browser - Firefox 131.0.2 and Chrome 129.0.6668.100
• React - v18.3.1

Tanstack Query adapter

react-query

TanStack Query version

v5.59.12

TypeScript version

v5.6.3

Additional context

The issue seems to come from the ensureSuspenseTimers function: https://github.com/TanStack/query/blob/main/packages/react-query/src/suspense.ts#L27

export const ensureSuspenseTimers = (
  defaultedOptions: DefaultedQueryObserverOptions<any, any, any, any, any>,
) => {
  if (defaultedOptions.suspense) {
    // Always set stale time when using suspense to prevent
    // fetching again when directly mounting after suspending
    if (typeof defaultedOptions.staleTime !== 'number') { // ❗🚩Issue here
      defaultedOptions.staleTime = 1000
    }
    if (typeof defaultedOptions.gcTime === 'number') {
      defaultedOptions.gcTime = Math.max(defaultedOptions.gcTime, 1000)
    }
  }
}

The following fix should work:

if (typeof defaultedOptions.staleTime !== 'number' && typeof defaultedOptions.staleTime !== 'function') { 
  defaultedOptions.staleTime = 1000
}