import { Observable } from 'rxjs';
export declare function isVisibleInViewport$(element: Element, options?: IntersectionObserverInit): Observable<boolean>;
export declare function isElementScrollAtStart(element: HTMLElement): boolean;
export declare function isElementScrollAtEnd(element: HTMLElement): boolean;
export declare function nodeMutation$(target: Node, options?: MutationObserverInit): Observable<MutationRecord[]>;
export declare function nodeResize$(target: Element): Observable<ResizeObserverEntry[]>;