Frameworks come and go; components built on the browser's own element model don't have to. This book teaches the platform first, then Lit on top of it, and builds one real design system the whole way through: from a bare button to a versioned, documented, server-renderable npm package.
Build a real, production-grade design system on the web platform — Prism DS, from a single custom element to an AI-agent-ready component library — with every example tested in a real browser before it made it into the book.