import { AnyFunction } from '../ts-helper';
export interface EventListenerHandler {
    target: EventTarget;
    remove: () => void;
}
export declare function addEventListener(target: EventTarget | null, eventType: string, listener: {
    bivarianceHack(value: Event): void;
}['bivarianceHack'], options?: AddEventListenerOptions | boolean): EventListenerHandler | null;
type CallBack = AnyFunction<void>;
export interface ListenerGroup {
    add: CallBack;
    removeAll: CallBack;
}
export declare function createListenerGroup(): ListenerGroup;
export {};