I'm looking for a way (plugin, module?) to achieve the following:
- auto-generate a Table of Content for certain long Joomla articles based on HTML tags (H1,H2 etc.) or CSS classes of headings
- show the ToC as a sticky sidebar
- when scrolling through the content, highlight the current heading in the ToC (and optionally expand subheadings)
I have seen similar things on several websites, so I'm surprised I couldn't find any working solution for Joomla (or maybe I just didn't know what to search for).
I thought JU ToC plugin should do something like this, but I can't get it to work. It generates a .jutoc element, but doesn't insert any links.
The Uber TOC module seems to do exactly what I would like in its demo page, but its download is no longer available.