toc.html.slim in asciidoctor-html5s-0.1.0.beta.4

- old
+ new

@@ -1,9 +1,11 @@
 / This template is used only for toc::[] macro; for document and preamble TOC
 / see document.html, preamble.html and _toc.html.
-- if document.attr? :toc
+- if document.attr?(:toc) && document.sections?
   - toc_id = id || ('toc' if document.embedded? || !document.attr?('toc-placement'))
   nav id=toc_id class=(attr :role, (document.attr 'toc-class', 'toc')) role='doc-toc'
-    h level=(section_level + 2) id=("#{toc_id}-title" if toc_id)
+    h level=(level + 2) id=("#{toc_id}-title" if toc_id)
       =(title || (document.attr 'toc-title'))
     / Renders outline.html.
     = converter.convert document, 'outline', :toclevels=>((attr :levels).to_i if attr? :levels)
+- else
+  /! toc disabled