Type 'void' is not assignable to type '{ user: Partial<User>; }'

[MananDesai54]

Describe the bug

Here interface MutationOptions<TData = unknown, TError = DefaultError, TVariables = void, TContext = unknown> { the default type of TVariables is void it is wrong and not letting me to re-assign any other type like here { user: Partial<User>; } it should be unknown

Your minimal, reproducible example

Find for Type MutationOptions

Steps to reproduce

Find for Type MutationOptions

Expected behavior

default type for TVariables should be unknown

How often does this bug happen?

Everytime giving type for mutationFn variables type

Screenshots or Videos

Platform

• OS : Manjaro Linux
• Browser: Brave

Tanstack Query adapter

react-query

TanStack Query version

v5.25.0

TypeScript version

v5

Additional context

No response

[TkDodo]

show a typescript playground please

[TkDodo]

TVariables is void so that you can have mutations that don't take parameters. This is very much on purpose. Moving to discussion.

[MananDesai54]

But then how can I provide Params to mutationFn ? As we used to do in v4