import { type MutableRefObject } from 'react';
/**
 * @public
 */
export interface ContainerSize {
    /** The border-box width of the container. */
    width: number;
    /** The border-box height of the container. */
    height: number;
    /** The content-box width of the container. */
    contentWidth: number;
    /** The content-box height of the container. */
    contentHeight: number;
}
/**
 * `useContainerSize` is a hook that observes and returns the size of a container
 * on the page.
 * @public
 */
export declare function useContainerSize(
/** Reference of the container to observe. */
ref: MutableRefObject<HTMLElement | null>): ContainerSize;