/**
 * A React hook to measure the size of an HTML element.
 * TODO: Implement support for an object containing an optional ref to attach to the element.
 * @returns A tuple containing a ref to attach to the element and an object with the element's width and height.
 */
export declare function useElementSize<T extends Element>(): readonly [
    React.Ref<T>,
    {
        width: number;
        height: number;
    }
];