A new proposal suggests using CSS Web Components for marketing site design systems, skipping JavaScript entirely. This approach leverages custom elements as HTML wrappers, styling them purely with CSS for layout and variants. It aims to improve performance on low-powered devices by removing JS dependencies for static components.

The idea builds on HTML Web Components, which hydrate with minimal JavaScript. By removing that hydration, you get fully server-renderable components that remain styleable with standard CSS. This method aligns with progressive enhancement goals, offering accessibility benefits and reducing complexity for marketing-focused UI patterns.

Implementation uses CSS attribute selectors to create component variants, like a reverse layout for swimlanes. This avoids naming collisions with standard HTML attributes. The approach could extend to buttons, accordions, and more, leveraging modern CSS features like container queries and the Popover API for interactive elements without JavaScript.