Table of Contents

It would be really great to have the functionality to add a table of contents that can remain visible while scrolling through the blog article, like on this page: https://webwave.me/how-to-become-a-web-designer

I understand this is possible if I make a page and not a blog post, but then I loose the point of having a blog.

If I have to do that for all my blog articles, then I have to recreate manually all the in-built functionality of a blog (like being able to show blog posts by category, show latest posts etc). 

If the tool could automatically pull in the specified headings (e.g. I can select H2 and H3) then that would be really cool and so useful.

Thank you!