Object literal may only specify known properties, and 'antialiasing' does not exist in type 'GPUCanvasConfiguration'.ts(2353)
But then how do I disable anti aliasing?
You don't. webgpu does not have any kind on auto antialiasing like webgl.
In WebGPU if you want antialiasing like webgl you have to do it manually by creating your own multisampled texture, rendering to it, and resolving it to the canvas. You can see an example in this answer
by default, webgpu does not antialias
You might find this article helpful if you're new to WebGPU and already familiar with WebGL