interface HorizontalSidePosition {
    top: number;
    left: number;
    transformOrigin: string;
}
export declare function getHorizontalSidePosition(targetEl: HTMLElement, popupSize: {
    width: number;
    height: number;
}, config: {
    placement: 'right' | 'left';
    gap?: number;
    inWindow?: number | false;
}): HorizontalSidePosition;
export {};