Right-side navigation picking up Headings in Text Web Part

[J-Potts]

Hi all,

First post (and I really have looked everywhere before submitting myself to this question).

How does one go about the right-hand in page navigation, seen throughout these pages... 

Introduction to SharePoint - SharePoint in Microsoft 365 | Microsoft Docs

...as the "In this article" navigation?

I'm assuming it's some kind of web-part, that is able to pick up on Heading styles in the Text web part that carries the body of text for each page.

And for a bonus point, can I this section to pick up two levels of Heading Style?

Any help or guidance would be much appreciated.

Cheers,

Jim

[#2]

Hi @J-Potts 

right, it's a WebPart.

Search for "Table of contents", here are two examples on GitHub:

https://github.com/RedEchidnaUK/Table-of-Contents

https://github.com/Portiva-O365/webpart-tableofcontents

Regards, Dave