import { type CSSProperties, type RefObject } from 'react';
type Options = {
    bottomOffset?: number;
    min?: number;
    includeMarginTop?: boolean;
    watchRef?: RefObject<HTMLElement | null>;
};
export declare function useViewportFill<T extends HTMLElement>(ref: RefObject<T | null>, { bottomOffset, min, includeMarginTop, watchRef }?: Options): {
    maxHeight: number;
    style: CSSProperties;
    recompute: () => void;
};
export {};