export declare const IS_VISIBLE_ATTRIBUTE = "data-is-visible";
export declare const FOCUSZONE_ID_ATTRIBUTE = "data-focuszone-id";
export declare const FOCUSZONE_SUB_ATTRIBUTE = "data-is-sub-focuszone";
export declare const HIDDEN_FROM_ACC_TREE = "data-is-hidden-from-acc-tree";
export { getDocument, getParent, getWindow } from '@uifabric/utilities';
/**
 * Gets the first focusable element.
 *
 * @public
 */
export declare function getFirstFocusable(rootElement: HTMLElement, currentElement: HTMLElement, includeElementsInFocusZones?: boolean): HTMLElement | null;
/**
 * Gets the last focusable element.
 *
 * @public
 */
export declare function getLastFocusable(rootElement: HTMLElement, currentElement: HTMLElement, includeElementsInFocusZones?: boolean): HTMLElement | null;
/**
 * Gets the first tabbable element.
 * The difference between focusable and tabbable is that tabbable elements are focusable elements that also have tabIndex != -1.
 * @param rootElement - The parent element to search beneath.
 * @param currentElement - The descendant of rootElement to start the search at.  This element is the first one checked,
 * and iteration continues forward.  Typical use passes rootElement.firstChild.
 * @param includeElementsInFocusZones - true if traversal should go into FocusZone descendants.
 * @public
 */
export declare function getFirstTabbable(rootElement: HTMLElement, currentElement: HTMLElement, includeElementsInFocusZones?: boolean, checkNode?: boolean): HTMLElement | null;
/**
 * Gets the last tabbable element.
 * The difference between focusable and tabbable is that tabbable elements are focusable elements that also have tabIndex != -1.
 * @param rootElement - The parent element to search beneath.
 * @param currentElement - The descendant of rootElement to start the search at.  This element is the first one checked,
 * and iteration continues in reverse.  Typical use passes rootElement.lastChild.
 * @param includeElementsInFocusZones - true if traversal should go into FocusZone descendants.
 * @public
 */
export declare function getLastTabbable(rootElement: HTMLElement, currentElement: HTMLElement, includeElementsInFocusZones?: boolean, checkNode?: boolean): HTMLElement | null;
/**
 * Traverse to find the previous element.
 * If tabbable is true, the element must have tabIndex != -1.
 *
 * @public
 */
export declare function getPreviousElement(rootElement: HTMLElement, currentElement: HTMLElement | null, checkNode?: boolean, suppressParentTraversal?: boolean, traverseChildren?: boolean, includeElementsInFocusZones?: boolean, tabbable?: boolean): HTMLElement | null;
/**
 * Traverse to find the next focusable element.
 * If tabbable is true, the element must have tabIndex != -1.
 *
 * @public
 */
export declare function getNextElement(rootElement: HTMLElement, currentElement: HTMLElement | null, checkNode?: boolean, suppressParentTraversal?: boolean, suppressChildTraversal?: boolean, includeElementsInFocusZones?: boolean, tabbable?: boolean): HTMLElement | null;
/**
 * Determines if an element is visible.
 *
 * @public
 */
export declare function isElementVisible(element: HTMLElement | undefined | null): boolean;
/**
 * Determines if an element can receive focus programmatically or via a mouse click.
 * If checkTabIndex is true, additionally checks to ensure the element can be focused with the tab key, meaning tabIndex != -1.
 *
 * @public
 */
export declare function isElementTabbable(element: HTMLElement, checkTabIndex?: boolean): boolean;
/**
 * Determines if a given element is a focus zone.
 *
 * @public
 */
export declare function isElementFocusZone(element?: HTMLElement): boolean;
/**
 * Determines if a given element is a focus sub zone.
 *
 * @public
 */
export declare function isElementFocusSubZone(element?: HTMLElement): boolean;
/**
 * Sets focus to an element asynchronously. The focus will be set at the next browser repaint,
 * meaning it won't cause any extra recalculations. If more than one focusAsync is called during one frame,
 * only the latest called focusAsync element will actually be focused
 * @param element - The element to focus
 */
export declare function focusAsync(element: HTMLElement | {
    focus: () => void;
} | undefined | null): void;
/**
 * Finds the closest focusable element via an index path from a parent. See
 * `getElementIndexPath` for getting an index path from an element to a child.
 */
export declare function getFocusableByIndexPath(parent: HTMLElement, path: number[]): HTMLElement | undefined;
/**
 * Finds the element index path from a parent element to a child element.
 *
 * If you had this node structure: "A has children [B, C] and C has child D",
 * the index path from A to D would be [1, 0], or `parent.chidren[1].children[0]`.
 */
export declare function getElementIndexPath(fromElement: HTMLElement, toElement: HTMLElement): number[];