Building a Slick Animated Table of Contents with SVG

This article demonstrates creating a dynamic table of contents (TOC) similar to Clerk's, using SVG and CSS animations. The author first crafts animated line effects using SVG paths and the `mask` attribute. To animate the highlighted section of the TOC, they cleverly generate a mask map from an SVG path, then combine it with CSS's `mask-image` property and animations for a smooth, highlighted effect. The process showcases SVG's power in front-end animation and the author's ingenuity and attention to detail.