/**
 * 类型安全的事件总线
 * 支持事件订阅、发布、一次性监听
 */
type EventCallback<T = unknown> = (data: T) => void;
interface EventSubscription {
    unsubscribe: () => void;
}
export declare class EventBus<EventMap extends Record<string, unknown> = Record<string, unknown>> {
    private listeners;
    /**
     * 订阅事件
     */
    on<K extends keyof EventMap>(event: K, callback: EventCallback<EventMap[K]>): EventSubscription;
    /**
     * 一次性订阅
     */
    once<K extends keyof EventMap>(event: K, callback: EventCallback<EventMap[K]>): EventSubscription;
    /**
     * 取消订阅
     */
    off<K extends keyof EventMap>(event: K, callback: EventCallback<EventMap[K]>): void;
    /**
     * 发布事件
     */
    emit<K extends keyof EventMap>(event: K, data: EventMap[K]): void;
    /**
     * 清除指定事件的所有监听器
     */
    clear(event?: keyof EventMap): void;
    /**
     * 获取事件监听器数量
     */
    listenerCount(event: keyof EventMap): number;
}
export declare const globalEvents: EventBus<Record<string, unknown>>;
export {};
//# sourceMappingURL=EventBus.d.ts.map