import EventEmitter from 'eventemitter3';
import type { SyntheticEvent } from './synthetic-event';
import type { SyntheticEventListener, SyntheticEventTarget } from './types';
/**
 * EventKey 会根据是否 capture 决定后缀
 *
 * 以 `click` 为例，在 capture 阶段会被转换为 `clickcapture`
 *
 */
type EventKey = string & {
    tag: 'EventKey';
};
export declare class SyntheticEventDispatcher extends EventEmitter {
    /**
     * _events 是 EventEmitter 的私有成员
     */
    private _events;
    addEventListener(type: string, listener: SyntheticEventListener, options?: boolean | AddEventListenerOptions): void;
    static getEventKey(type: string, capture?: boolean): EventKey;
    /**
     * 发射一个事件
     *
     * 在内部会判断 isImmediatePropagationStopped() 然后停止剩余事件处理函数
     *
     * @param key 指定事件类型，可以通过 SyntheticEventDispatcher.getEventKey 获得
     * @param event 要发射的事件
     * @returns
     */
    emitEvent(key: EventKey, event: SyntheticEvent<SyntheticEventTarget, Event>): void;
    removeEventListener(type: string, listener: SyntheticEventListener, options?: boolean | EventListenerOptions): void;
}
export {};