import type { Parts } from "../../http/request.js";
export type DynamicMaxAge = (origin: string, parts: Parts) => number;
/**
 * Holds configuration for how to set the `Access-Control-Max-Age` header.
 *
 * @see [MDN](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Max-Age)
 * @see {@link CorsLayer.maxAge}
 */
export declare class MaxAge {
    private readonly inner;
    private constructor();
    static default(): MaxAge;
    static from(like: MaxAgeLike): MaxAge;
    /**
     * Disables the `Access-Control-Max-Age` header.
     */
    static none(): MaxAge;
    /**
     * Sets a fixed `Access-Control-Max-Age` header.
     */
    static exact(maxAge: number): MaxAge;
    /**
     * Sets a dynamic `Access-Control-Max-Age` header.
     */
    static dynamic(fn: DynamicMaxAge): MaxAge;
}
export type MaxAgeLike = MaxAge | number | DynamicMaxAge | null;