/**
 * Focus management utilities for accessibility
 */
/**
 * Traps focus within a container (for modals, dialogs, dropdowns)
 * Returns a cleanup function that removes the event listener
 *
 * @example
 * ```svelte
 * <script>
 *   import { focus } from 'alus-ui';
 *   let modalElement;
 *
 *   function openModal() {
 *     modalElement.showModal();
 *     const cleanup = focus.trap(modalElement);
 *     // Store cleanup to call when modal closes
 *   }
 * </script>
 *
 * <dialog bind:this={modalElement}>
 *   <!-- Content -->
 * </dialog>
 * ```
 */
export declare function trap(container: HTMLElement): () => void;
/**
 * Moves focus to first focusable element in container
 *
 * @example
 * ```svelte
 * <script>
 *   import { focus } from 'alus-ui';
 *   let dialogElement;
 *
 *   function open() {
 *     dialogElement.showModal();
 *     focus.focusFirst(dialogElement);
 *   }
 * </script>
 * ```
 */
export declare function focusFirst(container: HTMLElement): void;
/**
 * Moves focus to last focusable element in container
 */
export declare function focusLast(container: HTMLElement): void;
/**
 * Checks if an element can receive focus
 */
export declare function isFocusable(element: HTMLElement): boolean;