/**
 * Thin wrappers over the real Fullscreen API, used by the toolbar's
 * presentation button. Kept side-effect-light and safe for non-browser
 * environments (all functions no-op when the API is unavailable).
 */
/** Whether the Fullscreen API is available on this document/element. */
export declare function isFullscreenSupported(): boolean;
/** Whether any element is currently fullscreen. */
export declare function isFullscreenActive(): boolean;
/** Enter fullscreen on `el`, swallowing rejection (user gesture policies). */
export declare function enterFullscreen(el: HTMLElement): Promise<void>;
/** Exit fullscreen if active. */
export declare function exitFullscreen(): Promise<void>;
/** Toggle fullscreen for `el`. */
export declare function toggleFullscreen(el: HTMLElement): Promise<void>;
//# sourceMappingURL=fullscreen.d.ts.map