Nav is empty if selector for heading are not h1,h2,etc. selector

You're right, we should properly handle the case when headings are not real HTML headings (h1, h2, ...).

Will work on a fix.

Yes thanks

as a dirty fix, this resolve the case

diff --git a/assets/js/tocjs.js b/assets/js/tocjs.js
index 443728a7cf..7c3af11e05 100644
--- a/assets/js/tocjs.js
+++ b/assets/js/tocjs.js
@@ -385,6 +385,15 @@
         lastLi = li;
         currentLevel = level;
       }
+      else {
+        const ul = document.createElement(opts.listType);
+        currentLevel = level;
+        ul.level = level;
+        ul.appendChild(li);
+        lastLi.appendChild(ul);
+        currentList = ul;
+        lastLi = li;
+      }
     });
   }

But defaulting to level 1 is good.

Problem should be fixed. Could you give a try to this issue's MR @flocondetoile?

Here is what I get on my side with DIV headings:

Nice. My TOCs are now fixed.

Fix released in version 3.0.0-beta4 → .

Automatically closed - issue fixed for 2 weeks with no activity.