import { RefObject } from 'react';
export interface ScrollGutter {
    /** Layout width the scrollbar takes: 15-17px for a classic bar, 0 for an overlay one. */
    width: number;
    /** The content is taller than the scroll container. */
    overflows: boolean;
}
/**
 * Measures a scroll container's scrollbar gutter and whether it overflows, and keeps both current.
 *
 * Meant for a container with `scrollbar-gutter: stable`: its gutter is then reserved whether or not it
 * scrolls, so `width` is a property of the platform (and zoom), not of the content — padding derived
 * from it cannot oscillate as scrolling starts and stops. Re-measured on its own resize, on any direct
 * child's resize (content growing inside a container already at max-height does not resize it), when
 * children are added or removed, and on window resize, which also catches browser zoom.
 *
 * Measured in a layout effect, so the corrected layout is in place before the first paint.
 */
export declare const useScrollGutter: (ref: RefObject<HTMLElement | null>) => ScrollGutter;