Show HN: Microgestures – Hand-tracking for WebXR with tap and swipe gestures (www.reactylon.com)

Microgestures is an implementation of Meta’s OpenXR hand‑tracking extension for WebXR, demonstrated for Quest 2/Pro/3/3S (Quest Browser only). It exposes five boolean inputs per hand—tap-thumb plus four D‑pad‑style swipes (swipe-left, swipe-right, swipe-forward, swipe-backward)—and a left‑hand menu gesture via pinch. That lets developers build low‑effort navigation, selection and scrolling interactions without large arm motions, improving ergonomics and accessibility for immersive web apps. From a developer standpoint, the project integrates with Babylon.js and provides a Reactylon Microgestures component that accepts gesture callback props and automatically subscribes/unsubscribes on mount/unmount. To use it you must disable the online WebXR controller profiles repo so the local oculus-hand profile loads until the official profile lands in the shared repo. The example shows wiring callbacks to update on‑screen text on a Babylon plane, and a short Quest 3 capture demonstrates the gestures. For engineers this means simple boolean signals to map to UI actions, reduced input complexity compared with full joint tracking, and an immediate path to add discrete hand inputs to WebXR scenes—see Babylon.js docs for implementation details.