import type { Router } from './router';
export interface CorsOptions {
    credentials?: boolean;
    exposedHeaders?: string[] | string;
    headers?: string[] | string;
    maxAge?: number;
    methods?: string[] | string;
    origins?: string[] | string;
}
export declare const cors: (options?: CorsOptions) => import("./middleware").Middleware<Record<never, never>>;
export declare const preflightHandler: (router: Router<any, any, any>, options?: CorsOptions) => import("./middleware").Middleware<Record<never, never>>;