- if (index = local_attr :index)
  a.footnote-ref [
      id=(footnoteref_id unless type == :xref)
      href="##{footnote_id}"
      title="View footnote #{index}"
      role='doc-noteref' ]
    | [#{index}]
- else
  a.footnote-ref.broken title="Unresolved footnote reference." [#{text}]