$newline never
<div .standalone-field .interactive-fieldset__target :fvRequired:.standalone-field--required :not fvRequired:.standalone-field--optional :is _Just fvErrors:.standalone-field--has-error>
  <div .standalone-field__input>
    ^{fvInput}
  $maybe err <- fvErrors
    <div .standalone-field__error>
      ^{messageTooltip (Message Error err $ Just IconStandaloneFieldError)}