import type { APIContext, MiddlewareNext } from "astro";
import { type HtmlnanoOptions, type HtmlnanoPreset } from "htmlnano";
/**
 * Minify Astro files with HTMLNano and CSSNano in the production mode
 *
 * @example Create `./src/middleware.ts` with the following content:
 *
 * ```ts
 * import { getAstroHTMLNano } from "astro-htmlnano"
 *
 * export const onRequest = getAstroHTMLNano()
 * ```
 *
 * @param options The HTMLNano options to use when transforming the HTML files
 * @param htmlnanoPreset The HTMLNano preset to use
 * @returns A middleware function that can be used in Astro
 * @note this is only enabled when `process.env.NODE_ENV === "production"`
 */
export declare function getAstroHTMLNano(options?: HtmlnanoOptions, htmlnanoPreset?: HtmlnanoPreset): (_context: APIContext, next: MiddlewareNext) => Promise<Response>;