This experiment is to demonstrate the 'Table of Contents' component on the left. It is a self-contained web-component which takes a HTML element's ID as its target-id attribute value, generates a representation of the hierarchy of headings within that target element, and displays it as a nested list. Where possible the component will also detect headings which have IDs, and make the entries in the table corresponding to that heading into a link.
The rest of the text content on this page is dynamically generated gibberish, with a number of headings and paragaphs to give you a better a sense of how the component works.