In short, JSAR is designed for XR devices like Apple Vision Pro and Quest (though it currently only supports AOSP devices, with a simulator available for macOS). Its most important feature is rendering multiple WebXR applications in the same scene while coexisting with the host environment (e.g., Unity or Unreal Engine). Each WebXR app can use different tech stacks like Three.js or Babylon.js.

Additionally, JSAR implements spatialized HTML and CSS, rendering each DOM element as a 3D object rather than flattening everything into a single 2D texture. This opens up new possibilities for web developers.

Yes, I do want JSAR to progressively align with web standards and improve WPT compatibility (to match engines like WebKit), but that’s not the primary goal. For JSAR, the focus is enabling web developers to incrementally build spatial web applications—smoothly, like how Apple developers work with SwiftUI.

As for the website, it hasn’t been updated in a while and was never optimized for mobile (since this is largely a solo project, and my priority is coding). I’ve moved the documentation to the repo: https://github.com/M-CreativeLab/jsar-runtime/blob/main/docs..., you can browse it directly on GitHub mobile.