diff --git a/resources/asciidoctor/lib/chunker/extension.rb b/resources/asciidoctor/lib/chunker/extension.rb
index 75b29d5f4701a..e10f3b8866645 100644
--- a/resources/asciidoctor/lib/chunker/extension.rb
+++ b/resources/asciidoctor/lib/chunker/extension.rb
@@ -143,6 +143,7 @@ def subdoc_attrs(doc, section)
       attrs['subdoc'] = true # Mark the subdoc so we don't try and chunk it
       attrs['title-separator'] = ''
       attrs['canonical-url'] = section.attributes['canonical-url']
+      attrs['current-url'] = "#{section.id}.html"
       attrs.merge! find_related(section)
       attrs
     end
diff --git a/resources/asciidoctor/lib/chunker/nav.rb b/resources/asciidoctor/lib/chunker/nav.rb
index 785aa4f77a41a..f43f4dad3ddee 100644
--- a/resources/asciidoctor/lib/chunker/nav.rb
+++ b/resources/asciidoctor/lib/chunker/nav.rb
@@ -12,8 +12,11 @@ class Nav
 
     def initialize(doc)
       body = nav_body doc
+
+      puts "current-url: #{doc.attr('current-url')}"
+
       @header = Asciidoctor::Block.new(doc, :pass, source: <<~HTML)
-        <div class="navheader">
+        <div class="navheader" data-current-url="#{doc.attr('current-url')}">
         #{body}
         </div>
       HTML