interface OverlayOptions {
    x: OverlayPosition;
    y: OverlayPosition;
    width: boolean;
    height: boolean;
    onOverflow: (data: OverflowData) => void;
}
export declare type OverlayPosition = `before` | `start` | `center` | `end` | `after`;
export interface OverflowData {
    anchorBounds: {
        x: number;
        y: number;
        width: number;
        height: number;
    };
    overlayBounds: {
        x: number;
        y: number;
        width: number;
        height: number;
    };
    viewport: {
        width: number;
        height: number;
    };
    overlay: HTMLElement;
    anchor: Element;
}
export declare const layoutOverlay: {
    (anchor: Element, overlay: HTMLElement, options?: Partial<OverlayOptions>): {
        stop: () => void;
        updateOptions: (newOptions: Partial<OverlayOptions>) => void;
    };
    NOT_PLACED: string;
};
export {};
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