import type { H3Event } from "h3";
/**
 * Whether the browser reached this request over HTTPS. Gates `Secure` /
 * `SameSite=None` cookie attributes and HSTS.
 */
export declare function isHttpsRequest(event: H3Event): boolean;
/** A dev server that browsers reach through Builder's HTTPS preview tunnel. */
export declare function isBuilderPreviewHttpsEnvironment(): boolean;