import type { MaybeRef } from './_shared';
import type { Ref } from '@stacksjs/stx';
/**
 * Reactive state of whether focus is contained within the target element.
 *
 * @param target - The target element or a ref to one
 * @returns focused - true when focus is within the element or its descendants
 */
export declare function useFocusWithin(target: MaybeRef<HTMLElement | null | undefined>): { focused: Ref<boolean> };