You can test WebXR on Chrome M67+ (with the WebXR and Gamepad Extensions flags enabled from
chrome://flags). Tentative timeline for Chrome: September 2018. Other browser vendors: TBD.
- Chrome Beta M67: Announcing WebXR Origin Trial
- Intent to Experiment (Chromium mailing list)
- https://github.com/immersive-web/webxr-reference#readme (WIP documentation which will eventually live on MDN)