declare type AppearEvent = CustomEvent<IntersectionObserverEntry>;
interface OnEvent {
    (e: AppearEvent): any;
}
declare type Options = boolean | (AddEventListenerOptions & IntersectionObserverInit);
export declare const EVENT_LISTENERS: unique symbol;
export declare enum EVENT_TYPE {
    APPEAR = "appear",
    DISAPPEAR = "disappear"
}
export declare function addEventListener(ele: Element, type: EVENT_TYPE, onEvent: OnEvent, options?: Options): void;
export declare function addAppearListener(el: Element, onAppear: OnEvent, options?: Options): void;
export declare function addDisappearListener(el: Element, onDisappear: OnEvent, options?: Options): void;
export declare function removeEventListener(ele: Element, type: EVENT_TYPE, onEvent: OnEvent, options?: Options): void;
export declare function removeAppearListener(el: Element, onAppear: OnEvent, options?: Options): void;
export declare function removeDisappearListener(el: Element, onDisappear: OnEvent, options?: Options): void;
export {};