How can I return 404 error if there is no data?

[imadatyatalah]

Something similar to this:

export async function getStaticProps(context) {
  const res = await fetch(`https://.../data`)
  const data = await res.json()

  if (!data) {
    return {
      notFound: true,
    }
  }

  return {
    props: { data }, // will be passed to the page component as props
  }
}

My code:

export const getStaticPaths = async () => {
  return { paths: [], fallback: true };
};

export const getStaticProps = async ({ params }) => {
  const queryClient = new QueryClient();

  await queryClient.prefetchQuery(["posts", params.user], () =>
    fetcher(`http://localhost:3000/api/user/${params.user}`)
  );

  return {
    props: { dehydratedState: dehydrate(queryClient) },
    revalidate: 1,
  };
};

[imadatyatalah]

I've fixed the issue via fetchQuery(), Thanks #1494