/**
 * 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[];
/**
 * 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;