type Function = (...args: any[]) => any;
export declare function on<T extends Window | Document | HTMLElement | EventTarget>(obj: T | null, ...args: Parameters<T["addEventListener"]> | [string, Function | null, ...any]): void;
export declare function off<T extends Window | Document | HTMLElement | EventTarget>(obj: T | null, ...args: Parameters<T["removeEventListener"]> | [string, Function | null, ...any]): void;
export declare const isBrowser: boolean;
export declare const isNavigator: boolean;
export {};