import { PharosElement } from './pharos-element';
import type { PropertyValues } from 'lit';
import type { Side, Placement, Strategy as PositioningStrategy } from '@floating-ui/dom';
export { arrow, autoUpdate, computePosition, flip, offset, shift } from '@floating-ui/dom';
export type { Placement, PositioningStrategy, Side };
export declare const allStrategies: PositioningStrategy[];
export declare const allPlacements: Placement[];
/**
 * The base overlay element class to house shared properties, styles, and methods.
 *
 */
export declare class OverlayElement extends PharosElement {
    /**
     * Indicates if the overlay is open.
     * @attr open
     */
    open: boolean;
    /**
     * Describes the preferred placement of the overlay.
     * @attr placement
     */
    placement: Placement | 'auto';
    /**
     * List of placements to try in the order provided when no space is available for the preferred placement.
     */
    fallbackPlacements?: (Placement | 'auto')[];
    /**
     * Describes the positioning strategy to use. If your target element is in a fixed container, use the fixed strategy.
     * @attr strategy
     */
    strategy: PositioningStrategy;
    protected _filteredFallbackPlacements?: Placement[];
    protected update(changedProperties: PropertyValues): void;
}
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