I think this is another thing that needs to be added to the list. WebGPU supports a stride of 0 for attributes. OpenGL ES does not. Stride of 0 in GL = advance the size of the attribute. Stride of 0 in WebGPU = a stride of 0 as in don't advance the attribute. Just keep reading the same value.

I guess in Compat a stride if 0 in an attribute would generate a validation error? Otherwise you could read value in the buffer, turn off the attribute (gl.disableVertexAttribPointer), and set the attribute's constant value (gl.vertexAttrib4f(...valueReadFromBuffer))

Originally posted by @greggman in #4266 (comment)