Feature request: better Table of Contents (collapsible, auto-scroll, only some headings etc.)

[ManasMadrecha]

Hi, first of all, thanks for this amazing extension 💛

It would be great to have some more features in the Table of Contents:

Auto scroll

• As one scrolls the page, the TOC should also scroll to that respective heading's position.
• This is enabled on several websites (e.g., Vue), and even in VS Code
• Maybe it can be achieved using Intersection Observer

Collapsible Headings

• For a document with several headings, the TOC can become very long.
• So, it would be great to collapse the TOC to show only upto a certain heading, i.e. H2 or H3
• It can be achieved by simply using details tag in the TOC's headings texts.

TOC Headings option

• If the collapsible option is present, then that's great
• If not, then the extension should an option to choosing the order up to which headings should be generated.
• E.g., one may not need H5 or H6 headings to clutter the TOC.

Thanks once again.

[simov]

These are all really great suggestions, thank you!

[giuseppe-dandrea]

#190 I implemented the collapsible toc, I'm using it for a while now and it's really useful when the toc is big.

[simov]

The Auto Scroll item was fixed in v5.1