Table of Contents

Scans the page for the heading levels you choose and builds the list, so it stays correct as the content changes. Four layouts: boxed, minimal, sidebar rail and inline chips, with numbered, bullet, plain or left-rail list styles. Limit the scan to one CSS selector, exclude headings by text, and hide the whole block when there are fewer than N headings. It can collapse (always, or only on mobile), stick while scrolling with its own offset, highlight the section being read, offset the scroll for a fixed header, update the URL hash, show a reading progress line and add a back to top link.