/**
 * Prefer the live slideshow surface so host-app chrome (sidebars, cards)
 * is not part of the fullscreen tree. `document.documentElement` is last
 * resort — fullscreening the page keeps that chrome on screen.
 */
export declare function getFullscreenElement(): HTMLElement;
export declare const enterFullscreen: () => void;
export declare const exitFullscreen: () => void;
export declare const isFullscreen: () => boolean;