import { RefObject } from 'react';
/**
 * Custom hook for measuring element dimensions and tracking size changes.
 *
 * Features:
 * - Measures element dimensions using getBoundingClientRect
 * - Tracks size changes using ResizeObserver
 * - Provides real-time size updates
 * - Handles initial size measurement on mount
 * - Returns DOMRectReadOnly for comprehensive size information
 * - Automatically cleans up observer on unmount
 * - Uses useLayoutEffect for immediate initial measurement
 *
 * @param target - Reference to the element to measure
 * @returns Current element size as DOMRectReadOnly or undefined
 */
export declare const useSize: (target: RefObject<HTMLElement>) => DOMRectReadOnly | undefined;
export default useSize;