import { type RefObject } from 'react';
type Size = {
    width: number | undefined;
    height: number | undefined;
};
type UseResizeObserverOptions<T extends HTMLElement = HTMLElement> = {
    ref: RefObject<T>;
    onResize?: (size: Size) => void;
    box?: 'border-box' | 'content-box' | 'device-pixel-content-box';
};
export declare function useResizeObserver<T extends HTMLElement = HTMLElement>(options: UseResizeObserverOptions<T>): Size;
export {};