Overview
The demo is a mobile header for a product site with Products, Pricing, Docs, Changelog and Sign in. While the menu is open, focus stays inside it, the page behind does not scroll, and Escape closes it and returns focus to the button. Motion: enter: 240 ms, cubic-bezier(0.2,0.8,0.2,1); exit: 180 ms, cubic-bezier(0.4,0,1,1). Every duration and easing curve lives in one tokens file, so changing a value there changes the motion everywhere. With reduced motion turned on, the component changes state without movement and stays fully usable. Built with React 19 and TypeScript, Tailwind CSS 4 and Motion, with keyboard and screen reader behavior from Base UI. Light and dark themes come from CSS variables you can edit. Included: the component source, the accessible behavior it is built on, shared motion tokens, light and dark theme variables, a runnable demo page, and setup guides for people and for AI coding agents.
Highlights
- Production-ready, documented source
- Clean, componentized architecture
- Drops into your stack with minimal setup
