emove: mouseEventHandler,
		mouseup: mouseEventHandler,
		pointerdown: mouseEventHandler,
		pointermove: mouseEventHandler,
		pointerup: mouseEventHandler,
		touchstart: touchEventHandler,
		touchmove: touchEventHandler,
		touchend: touchEventHandler,
		wheel: wheelEventHandler,
		keydown: filteredKeydownEventHandler,
	};
	const proxy = new ElementProxy( canvas, worker, eventHandlers );
	worker.postMessage( {
		type: 'start',
		canvas: offscreen,
		canvasId: proxy.id,
	}, [ offscreen ] );
	console.log( 'usi