TVariables default Type #8751

Shouldn't TVariables default be "any" or "unknown" so you dont have to define it unless its important to you to be defined

that is just because if you write:

  const { mutate } = useMutation((values) =>

    axios.post('/test', values),

  );

it is not defined what values should have for a type. The generic TVariables defaults to void and that's the error you are getting. If you write a function in typescript:

const myFunction = (variables) => console.log(variables)

the compiler needs to know what variables will be, otherwise, it will be implicitly any.

if you take my example where values has a type of values: Variables, you will see that it works.

Originally posted by @TkDodo in #2134