If the hello_triangle example is changed slightly to only draw the triangle once, and we change the color attachment's load_op to wgpu::LoadOp::Load instead of Clear, my expectation is that the result is the same, except that the green clear color is gone. However the result is that the red triangle only shows up every other frame, with blank frames in between.

Is this expected behavi

Instead of relying on our own types, we should consider using an NPM module such as this.

This will reduce the likelihood of mistakes, such as with #345 and #346, as well as help us stay up to date.