How to use `useMutation` with fetch (not axios)

const postData = () => {
  const res = await fetch("/profile", {
    method: "POST",
    header: {
      // ...
    }
    body: {
      // ...
    }
  );

  const data = await res.json();
  return data;
}


useMutation({
  mutationFn: postData
})

const postData = () => {
  const res = await fetch("/profile", {
    method: "POST",
    header: {
      // ...
    }
    body: {
      // ...
    }
  );

  const data = await res.json();
  return data;
}


useMutation({
  mutationFn: postData
})