Reactive HTML with 3 pillars: pattern parser, proxy, and programs. Browser-native API, lightweight reactive projection. Ready for widgets or SPA. A different approach from virtual DOM with fine-grained reactivity — slot-ready even with empty initial state. 3.9 KB gzip. No build step. Use directly via CDN.

lightweight reactive spa vanilla-js html-parser html-react-parser zero-dependency front-end-framework ui-library browser-native no-jsx no-vdom reactive-framework fine-grained-reactivity htmx-alternative agent-friendly vdom-alternative proxy-reactivity pattern-parser

• Updated Oct 2, 2026
• TypeScript