Feature request: Allow some variable names from @tanstack/query/exhaustive-deps

[rhuanbarreto]

I normally create custom hooks that return queries that depends on other values, like an authentication token. I use the authentication token in queryFn but then the eslint rule @tanstack/query/exhaustive-deps requires the token to be in the query key, which is not good once authentication tokens are not supposed to be part of a query key.

It would be good to configure the rule with a list of allowed names to not require them in the queryKey, like token

[TkDodo]

if your code looks like this:

const { token } = useAuth()
const query = useQuery({
  queryKey: ['something'],
  queryFn: () => fetchSomething(token)
})

then the rule is technically correct because you are closing over token and you might run into stale closure issues like that. Adding the token to the key is likely not the solution though.

The real question is: Why is token part of the React lifecycle ? Ideally, you'd just call fetchSomething(), and that would read the token in an interceptor or middleware and attach it to the header. Or, you would have a stable function like getLatestToken() that you can import, which you could then call in your queryFn:

queryFn: async () => {
  const token = await getLatestToken()
  return fetchSomething(token)
}

but ideally, all of this would live outside of react ...