export type ViewerFullscreenState = {
    active: boolean;
    fallback: boolean;
};
export type ViewerFullscreenController = {
    toggle: () => Promise<void>;
    attach: () => () => void;
};
export declare const isIPadLikeDevice: (navigatorLike?: Pick<Navigator, "userAgent" | "platform" | "maxTouchPoints">) => boolean;
export declare const createViewerFullscreenController: ({ getRoot, getShadowHost, onChange, preferFallback, }: {
    getRoot: () => HTMLElement | null;
    getShadowHost: () => Element | null;
    onChange: (state: ViewerFullscreenState) => void;
    preferFallback?: () => boolean;
}) => ViewerFullscreenController;