com/rust-windowing/winit: cross-platform windowing and input https://github.com/linebender/vello: a pure Rust 2D graphics library https://github.com/servo/rust-cssparser: a CSS parser https://github.com/housleyjk/ws-rs: layers) The layer grand manager (manages all layer managers for WebXR sessions) Finally, there are graphics-specific concepts that are important for the low-level details of rendering with WebXR: Surfman synchronous message to the WebGL thread 3. The WebGL thread receives the message 4. Some backend-specific, graphics-specific initialization happens on the WebGL thread, hidden behind the layer manager factory abstraction