import { RefObject } from 'react';
/**
 * Tracks an element's width. The first measurement happens synchronously in a
 * layout effect (before paint) so width-driven layouts never flash an
 * unmeasured state; subsequent resize events are rAF-throttled.
 */
export declare function useElementWidthPx<T extends HTMLElement>(): {
    ref: RefObject<T>;
    widthPx: number;
};