import * as React from 'react';
export declare const IsFocusVisibleClassName = "ms-Fabric--isFocusVisible";
export declare const IsFocusHiddenClassName = "ms-Fabric--isFocusHidden";
/**
 * Sets the visibility of focus styling.
 *
 * By default, focus styles (the box surrounding a focused Button, for example) only show up when navigational
 * keypresses occur (through Tab, arrows, PgUp/PgDn, Home and End), and are hidden when mouse interactions occur.
 * This API provides an imperative way to turn them on/off.
 *
 * A use case might be when you have a keypress like ctrl-f6 navigate to a particular region on the page,
 * and want focus to show up.
 *
 * @param enabled - Whether to turn focus visibility on or off.
 * @param target - Optional target from which to get window in case no `providerElem` has been specified.
 * @param registeredProviders - Array of provider refs that are associated with a FocusRectsProvider. If no array
 *                              is passed in, the classnames are attached to the document body that contains `target`.
 */
export declare function setFocusVisibility(enabled: boolean, target?: Element, registeredProviders?: React.RefObject<HTMLElement>[]): void;