export declare type EventName = string;
export declare type Callback<P extends unknown[] = unknown[]> = (...payload: P) => void;
/**
 * 事件发射器接口，参考nodejs api `EventEmitter`.
 *
 * @see https://nodejs.org/dist/latest-v14.x/docs/api/events.html#events_class_eventemitter
 */
interface EventEmitter {
    /**
     * 注册事件.
     *
     * @template N Type of 事件类型.
     * @template P Type of callback参数类型.
     * @param name 事件名称.
     * @param callback 事件处理函数.
     */
    addEventListener: <N extends EventName = EventName, P extends unknown[] = unknown[]>(name: N, callback?: Callback<P>) => void;
    /**
     * 移除事件处理函数.
     *
     * @template N Type of 事件类型.
     * @template P Type of callback参数类型.
     * @param name 事件名称.
     * @param callback 事件处理函数.
     */
    removeEventListener: <N extends EventName = EventName, P extends unknown[] = unknown[]>(name: N, callback?: Callback<P>) => void;
    /**
     * 触发事件.
     *
     * @template N Type of 事件类型.
     * @template P Type of callback参数类型.
     * @param name 事件名称.
     * @param payload 事件执行参数.
     */
    dispatchEvent: <N extends EventName = EventName, P = unknown>(name: N, payload?: P) => void;
}
export default EventEmitter;