Webxr Ar Vr Development

WebXR AR/VR Development

Building immersive AR/VR experiences with WebXR — from session management and spatial tracking through 3D rendering, hand input, and performance optimization.

When to Use

• Building browser-based VR experiences
• Implementing AR features (object placement, face tracking)
• Creating cross-platform XR apps with Three.js or A-Frame
• Adding spatial UI and interactions

WebXR Setup

// Request XR session
async function startXR(mode = 'immersive-vr') {
    if (!navigator.xr) throw new Error('WebXR not supported');
    
    const session = await navigator.xr.requestSession(mode, {
        requiredFeatures: ['local-floor', 'hand-tracking']
    });
    
    session.addEventListener('end', () => { /* cleanup */ });
    return session;
}

// Animation loop with XR frame
function xrFrameCallback(time, frame) {
    const pose = frame.getViewerPose(referenceSpace);
    if (pose) {
        for (const view of pose.views) {
            // Render from each eye (left/right)
            renderer.render(scene, view.projectionMatrix, view.transform.matrix);
        }
    }
    session.requestAnimationFrame(xrFrameCallback);
}

Verification Checklist

• WebXR feature detection (navigator.xr)
• VR/AR session mode selected appropriately
• Reference space type chosen (local, local-floor, bounded-floor, unbounded)
• Hand/controller input handled
• Performance: 90fps target, use instancing, LOD
• Graceful fallback when WebXR unavailable