$newline never
$maybe csrf <- csrfToken
  <input type=hidden name=#{defaultCsrfParamName} value=#{csrf}>
$forall (k, v) <- navData
  <input type=hidden name=#{k} value=#{v}>
<button .navbar__container-link :highlightNav iN:.navbar__container-link--active type=submit>
  _{SomeMessage navLabel}