notModified and typescript inference

[gonstoll]

When using notModified together with ETags, how can I make it so that the type inference when using useLoaderData<typeof loader> is not affected by this new "intermediate" response?

export async function loader({request}: LoaderFunctionArgs) {
  const data = await db.select().from(users).all()
  const weakHash = md5(JSON.stringify(data))
  const etag = request.headers.get('If-None-Match')
  if (etag === weakHash) {
    return notModified() // This screws up type inference as now "" is a valid return type
  }
  const headers = {
    ETag: weakHash,
    'Cache-Control': "public, max-age=0, must-revalidate",
  }
  return json({data}, {headers})
}

export default function Page() {
  // `data` here is of type `any` because of type inference being screwed up
  const {data} = useLoaderData<typeof loader>()

  return <div />
}

Is it valid to do something like:

if (etag === weakHash) {
  return json({data}, {status: 304})
}

[gonstoll]

Just FYI what I ended up doing was:

if (etag === weakHash) {
  return json('' as unknown as {data: typeof data}, {status: 304})
}

I don't love it, but it's the only way I could get this to work 🤷‍♂️