OffscreenRenderingContext
Union of:
OffscreenCanvasRenderingContext2D
ImageBitmapRenderingContext
WebGLRenderingContext
WebGL2RenderingContext
GPUCanvasContext
Union of:
OffscreenCanvasRenderingContext2D
ImageBitmapRenderingContext
WebGLRenderingContext
WebGL2RenderingContext
GPUCanvasContext