import React from 'react';
/**
 * Gets all focusable child elements within a container.
 * Uses a comprehensive selector to find elements that can receive focus.
 * @param element - The container element to search within
 * @returns Array of focusable HTML elements
 */
export declare const focusableChildren: (element: HTMLElement) => HTMLElement[];
/**
 * Extracts the ref from a React element, handling version differences between React 18 and 19+.
 *
 * In React 18 and earlier, refs are stored directly on the element object.
 * In React 19+, refs are stored in the element's props object due to changes in React's internals.
 * This function automatically detects the React version and uses the appropriate access pattern.
 * @param child - The React element to extract the ref from
 * @returns The ref attached to the element, or undefined if no ref is present
 */
export declare const getChildRef: (child: React.ReactElement) => React.Ref<HTMLElement> | undefined;
/**
 * Checks if an element is disabled.
 * Considers various ways an element can be disabled including CSS classes and attributes.
 * @param element - The HTML element to check
 * @returns True if the element is disabled, false otherwise
 */
export declare const isDisabled: (element: HTMLElement) => boolean;
/**
 * Type guard to check if an object is an Element.
 * Handles edge cases including jQuery objects.
 * @param object - The object to check
 * @returns True if the object is an Element, false otherwise
 */
export declare const isElement: (object: unknown) => object is Element;
/**
 * Checks if an element is visible in the DOM.
 * Considers client rects and computed visibility styles, handling edge cases like details elements.
 * @param element - The HTML element to check for visibility
 * @returns True if the element is visible, false otherwise
 */
export declare const isVisible: (element: HTMLElement) => boolean;
/**
 * Merges multiple React refs into a single ref callback.
 * Handles both function refs and ref objects, gracefully ignoring failures.
 * @param refs - Array of React refs to merge
 * @returns A ref callback that applies to all provided refs
 */
export declare const mergeRefs: <T>(...refs: (React.Ref<T> | undefined)[]) => (node: T) => void;