_extensions/js/footer/footer.lua



function Pandoc(doc)
    if quarto.doc.is_format("html") then
        local footer_html = [[
<footer class="footer">
  <div class="nav-footer">
    <div class="nav-footer-center"><p><a href="../#colofon">Bidragsydere for dette nummer.</a></p></div>
  </div>
</footer>
        ]]
        table.insert(doc.blocks, pandoc.RawBlock('html', footer_html))
        return doc
    end
end