import { Listener } from './types';
declare class EventChannel {
    private _events;
    constructor();
    on(eventName: string, fn: Listener): void;
    once(eventName: string, fn: Listener): void;
    off(eventName: string, fn?: Listener): void;
    emit(eventName: string): void;
}
declare const eventChannel: EventChannel;
export default eventChannel;