export interface Coords {
    x: number;
    y: number;
}
export interface Dims {
    width: number;
    height: number;
}
export declare function isValidCoords(coords: Coords): boolean;
export declare function isValidDims(dims: Dims): boolean;
export declare function dist(a: Coords, b: Coords): number;
export declare function areaDiff(a: Dims, b: Dims): number;
export declare function getElementCoords(element: Element): Coords;
export declare function getElementDims(element: Element): Dims;
export declare function getNearestScrollAncestor(element: Element): Element;
export declare function getDefaultScrollingElement(): Element;
export declare function isDefaultScrollingElement(root: Element): boolean;
export declare function getValidPortalRoot(root: Element): Element;
export declare function getCombinedData(aCoords: Coords, aDims: Dims, bCoords: Coords, bDims: Dims): {
    coords: Coords;
    dims: Dims;
};
export declare function fitsWithin(aDims: Dims, bDims: Dims): boolean;
export declare function isWithinAt(aDims: Dims, bDims: Dims, aCoords?: Coords, bCoords?: Coords): boolean;
export declare function getFocusableElements(root: Element, includeSelf?: boolean): HTMLElement[];
export declare function getEdgeFocusables(defaultElement: HTMLElement, container?: HTMLElement, includeSelf?: boolean): {
    start: HTMLElement;
    end: HTMLElement;
};
export declare function isForeignTarget(root: Element, selector: string): boolean;