leapmotion/leapjs

Health v2 · maintenance only

Adoption not part of the score

2008 stars · 434 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

LeapJS is the official JavaScript client library for the Leap Motion Controller, providing real-time hand and finger tracking data via a WebSocket connection to the Leap Motion service. It supports both browser and Node.js environments, includes a plugin system, and works with Ultraleap Gemini V5 and Hyperion V6 tracking software.

Use cases

• track hand and finger positions in a web app
• build a hand-controlled cursor for on-screen interaction
• create gesture-based games in the browser
• read Leap Motion frames in a Node.js application
• build interactive 3D visualizations driven by hand motion
• extend Leap apps with modular plugins like screenPosition

When to choose

• you are building JavaScript web or Node.js apps with a Leap Motion / Ultraleap controller
• you need real-time skeletal hand tracking data with a simple loop API
• you want a plugin ecosystem and vector math helpers bundled in

When to avoid

• you don't have a Leap Motion or Ultraleap tracking device
• you need hand tracking without dedicated hardware (e.g., webcam-based)
• you're working in a non-JavaScript environment

Facets

library · maturity maintenance

sdk websocket animation developer-tools hardware graphics web-development browser cross-platform leap-motion hand-tracking gesture-recognition motion-controller real-time javascript nodejs

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