import "../_dnt.polyfills.js";
import { MiddlewareHandler } from "../router.js";
export interface CorsOptions {
    /**
     * if set true, use next() response, if false, use 204
     * @default false
     */
    preflightContinue?: boolean | null;
    /**
     * Access-Control-Allow-Origin
     * @default "*"
     */
    allowOrigin?: string[] | null;
    /**
     * Access-Control-Allow-Methods
     * @default "GET,HEAD,PUT,PATCH,POST,DELETE"
     */
    allowMethods?: string[] | null;
    /**
     * Access-Control-Allow-Credentials
     * @default false
     */
    allowCredentials?: boolean;
    /**
     * Access-Control-Allow-Headers
     * @default response Access-Control-Request-Headers
     */
    allowHeaders?: string[] | null;
    /**
     * Access-Control-Expose-Headers
     * @default (no header)
     */
    exposeHeaders?: string[] | null;
    /**
     * Access-Control-Max-Age (in seconds)
     * @default (no header)
     */
    maxAge?: number | string | null;
    /**
     * Access-Control-Allow-Private-Network
     * @default false
     */
    allowPrivateNetwork?: boolean | null;
}
export declare function cors(options?: CorsOptions): MiddlewareHandler;