That's because these demos seem to be out of date (originally those were for WebKit's WebGPU prototype, and then probably updated along the way but not complete

That's because these demos seem to be out of date (originally those were for WebKit's WebGPU prototype, and then probably updated along the way but not completely). Try these instead: https://webgpu.github.io/webgpu-samples https://webgpu.github.io/webgpu-samples