{{ $footnote_heading :=  printf "Footnotes" -}}
{{ if .Params.footnote_heading -}}
	{{ $footnote_heading =  .Params.footnote_heading -}}
{{end}}

<!--Add heading to footnotes, remove unused class-->
{{ $referencesWithoutHeading    := `(<(section|div) class="footnotes" role="doc-endnotes">
<hr>)` -}}
{{ $referencesWithHeading := printf `<section role="doc-endnotes" aria-labelledby="note-hd">
<h2 id="note-hd">%s</h2>` ($footnote_heading) -}}

<!--Remove deprecated DPUB-ARIA role and unused classes-->
{{ $endnote := `(role="doc-endnote"|class="footnote-(back)?ref")` }}
{{ $noEndnote := printf "" }}

<!--Move the Table of Contents heading *inside* the <nav> element-->
{{ $tocHeadingOutside := `<h2>Table of Contents</h2><nav(?:.*)>` }}
{{ $tocHeadingInside := `<nav id=TableOfContents role="doc-toc"><h2 id="toc-hd">Table of Contents</h2>` }}

<!--Give footnote backlinks accessible names-->
{{ $footnoteBacklinksBad  :=  `<a href="#fnref:([0-9]*)"(.*role="doc-backlink"(?:.*)?)>` }}
{{ $footnoteBacklinksGood :=  `<a href="#fnref:${1}" title="back to reference ${1}" aria-label="back to reference ${1}"${2}>` }}

{{ .Content | replaceRE $referencesWithoutHeading $referencesWithHeading | replaceRE $endnote $noEndnote | replaceRE $tocHeadingOutside $tocHeadingInside | replaceRE $footnoteBacklinksBad $footnoteBacklinksGood | safeHTML -}}