@uifabric/utilities/lib/focus.d.ts

/**
 * 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.
 * @param checkNode - Include currentElement in search when true. Defaults to true.
 * @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.
 * @param checkNode - Include currentElement in search when true. Defaults to true.
 * @public
 */
export declare function getLastTabbable(rootElement: HTMLElement, currentElement: HTMLElement, includeElementsInFocusZones?: boolean, checkNode?: boolean): HTMLElement | null;
/**
 * Attempts to focus the first focusable element that is a child or child's child of the rootElement.
 *
 * @public
 * @param rootElement - Element to start the search for a focusable child.
 * @returns True if focus was set, false if it was not.
 */
export declare function focusFirstChild(rootElement: HTMLElement): boolean;
/**
 * 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, allowFocusRoot?: boolean, tabbable?: boolean): HTMLElement | null;
/**
 * Traverse to find the next focusable element.
 * If tabbable is true, the element must have tabIndex != -1.
 *
 * @public
 * @param checkNode - Include currentElement in search when true.
 */
export declare function getNextElement(rootElement: HTMLElement, currentElement: HTMLElement | null, checkNode?: boolean, suppressParentTraversal?: boolean, suppressChildTraversal?: boolean, includeElementsInFocusZones?: boolean, allowFocusRoot?: 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;
/**
 * Determines if an element, or any of its children, contain focus.
 *
 * @public
 */
export declare function doesElementContainFocus(element: HTMLElement): boolean;
/**
 * Determines if an, or any of its ancestors, sepcificies that it doesn't want focus to wrap
 * @param element - element to start searching from
 * @param noWrapDataAttribute - the no wrap data attribute to match (either)
 * @returns true if focus should wrap, false otherwise
 */
export declare function shouldWrapFocus(element: HTMLElement, noWrapDataAttribute: 'data-no-vertical-wrap' | 'data-no-horizontal-wrap'): 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[];