{{- $url := split .Permalink "/" -}} {{- $page_slug := index $url (sub (len $url) 2) -}} {{- range $group := .Site.Data.sidebar -}} {{- $link := $group.title -}} {{- $link_slug := $link | urlize -}} {{- if $group.pages -}} {{- $link = index $group.pages 0 -}} {{- $link_slug = $link.title | urlize -}} {{- end -}} {{- $group_slug := $group.title | urlize -}} {{- $is_active_group := eq $.Page.Params.group $group_slug }}
{{ $group.title }} {{- if and $is_active_group $group.pages }}
    {{- range $doc := $group.pages -}} {{- $doc_slug := $doc.title | urlize }} {{- $doc.title -}} {{- end }}
{{- end }}
{{- end }}