import { RefObject } from 'react';
/**
 * A hook that tracks the intersection of an element with its parent or viewport.
 * Returns null if IntersectionObserver API is not available.
 * @param ref React ref object for the element to monitor
 * @param options IntersectionObserver configuration options
 * @returns The latest IntersectionObserverEntry or null
 */
export declare function useIntersectionObserver<T extends Element>(ref: RefObject<T>, options?: IntersectionObserverInit): IntersectionObserverEntry | null;