reuse_canvas = (width, height) => {
					let option_canvas = /** @type {PixelCanvas | undefined} */ ($option_container.find("canvas")[0]);
					if (option_canvas) {
						if (option_canvas.width !== width) { option_canvas.width = width; }
						if (option_canvas.height !== height) { option_canvas.height = height; }
					} else {
						option_canvas = make_canvas(width, height);
						$option_container.append(option_canvas);
					}
					return option_canvas;
				}
@param {number} width
@param {number} height
@returns {PixelCanvas}