app.jsx

const Widget: NextPage = () => {
  const router = useRouter();
  const { extensionUid } = router.query;
  if (!extensionUid) return null;

  return (
    <>
      <Wrapper uid={extensionUid as string} declaration={declaration}>
        <Field />
      </Wrapper>
      <style jsx global>{`
        html,
        body {
          height: auto;
        }
      `}</style>
    </>
  );
};