import { Placement } from './types';
export declare function isElementInViewport(el: HTMLElement | null): boolean;
export declare function computeTooltipPosition(targetRect: DOMRect, tooltipSize: {
    width: number;
    height: number;
}, placement?: Placement, containerRect?: DOMRect): {
    top: number;
    left: number;
    placement: Placement;
};