/**
 * 发布订阅
 * @filename: Events.ts
 * @author: Mr Prince
 * @date: 2021-09-24 10:42:28
 */
declare type Listener = (...args: any[]) => void;
declare class Events {
    private eventListeners;
    private getListeners;
    private setListeners;
    on(eventName: string, listener: Listener): Listener;
    /**
     * 只执行一次
     * 需要使用返回值来取消
     */
    once(eventName: string, listener: Listener): Listener;
    off(eventName: string, listener: Listener): void;
    emit(eventName: string, ...args: any[]): void;
}
export default Events;