Moon Rider
WebVR has been replaced by the WebXR Device API, that supports both Virtual Reality (VR) and Augmented Reality (AR).
So why write a post about WebVR?
Moon Rider. That's why.
Moon Rider is a free VR rhythm game built on WebVR that runs in a web browser.
Moon Rider is an impressive example of what can be done with WebVR.
https://moonrider.xyz
The Moon Rider code is available for download from GitHub
https://github.com/supermedium/moonrider

Moon Rider in Oculus Quest 2 Browser
A static WebVR scene
WebVR developers use entities to create scenes. Entities are created using assets.
A static scene can be created using a few web page tags.
A scene
JAVASCRIPT
1<body> 2 3 <a-scene> 4 5 <a-assets> 6 <a-asset-item id="engine" src="./assets/files/engine.glb"> 7 </a-asset-item> 8 </a-assets> 9 10 <a-entity position="0 0 -3"> 11 <a-gltf-model src="#engine" rotation="90 0 0" scale="18 18 18"></a-gltf-model> 12 </a-entity> 13 14 <a-entity light="type: point; intensity: 60; distance: 50; decay: 2" position="0 0 10"></a-entity> 15 16 </a-scene> 17 18</body> 19 20</html>