export declare const getObserver: (context: any, selector: string) => Promise<unknown>;
export declare const getWindowInfo: () => WechatMiniprogram.WindowInfo | WechatMiniprogram.SystemInfo;
export declare const getAppBaseInfo: () => WechatMiniprogram.SystemInfo | WechatMiniprogram.AppBaseInfo;
export declare const getDeviceInfo: () => WechatMiniprogram.SystemInfo | WechatMiniprogram.DeviceInfo;