WebSockets. URL: https://websockets.spec.whatwg.org/.
1 WebRTC: Real-time communication in browsers. URL: https://www.w3. org/TR/webrtc/
1 WebXR device API. URL: WebXR Device API; WebXR hand input module. URL: https://www.w3.org/TR/webxr-handinput-1/.
1 Spatial Anchors. Online. Available: https://azure.microsoft.com/en-us/products/spatial-anchors.