/// <reference types="react" />
import type { Placement } from '@popperjs/core';
import { Align } from '../../types';
export type ReferenceElement = HTMLElement | null;
export interface OverlayOptions {
    align?: Align;
    dropup?: boolean;
    flip?: boolean;
    positionFixed?: boolean;
}
export declare function getModifiers(props: Pick<OverlayOptions, 'align' | 'flip'>): {
    enabled: boolean;
    name: string;
}[];
export declare function getPlacement(props: Pick<OverlayOptions, 'align' | 'dropup'>): Placement;
export declare function useOverlay(referenceElement: ReferenceElement, options: OverlayOptions): {
    innerRef: import("react").Dispatch<import("react").SetStateAction<ReferenceElement>>;
    style: import("react").CSSProperties;
};
export default useOverlay;