DaengDo

type IOEvent =
  | { type: "keyDown" | "keyUp"; keyCode: number }
  | { type: "mouseDown" | "mouseUp"; mouseButton: number }
  | { type: "mouseMove" | "mouseWheel"; x: number; y: number };

class IOEventListener {
  private eventQueue = [] as IOEvent[];
  private isRunning = false;
  private eventQueueGenerator: Generator<undefined, void, unknown> | null = null;