import type { ResponseHeader } from "../shared";
declare const supportedValues: readonly ["no-referrer", "no-referrer-when-downgrade", "origin", "origin-when-cross-origin", "same-origin", "strict-origin", "strict-origin-when-cross-origin"];
declare type SupportedValue = typeof supportedValues[number];
export declare type ReferrerPolicyOption = false | SupportedValue | SupportedValue[];
export declare const createReferrerPolicyHeaderValue: (option?: false | "no-referrer" | "no-referrer-when-downgrade" | "origin" | "origin-when-cross-origin" | "same-origin" | "strict-origin" | "strict-origin-when-cross-origin" | ("no-referrer" | "no-referrer-when-downgrade" | "origin" | "origin-when-cross-origin" | "same-origin" | "strict-origin" | "strict-origin-when-cross-origin")[] | undefined) => string | undefined;
export declare const createReferrerPolicyHeader: (option?: false | "no-referrer" | "no-referrer-when-downgrade" | "origin" | "origin-when-cross-origin" | "same-origin" | "strict-origin" | "strict-origin-when-cross-origin" | ("no-referrer" | "no-referrer-when-downgrade" | "origin" | "origin-when-cross-origin" | "same-origin" | "strict-origin" | "strict-origin-when-cross-origin")[] | undefined, headerValueCreator?: (option?: false | "no-referrer" | "no-referrer-when-downgrade" | "origin" | "origin-when-cross-origin" | "same-origin" | "strict-origin" | "strict-origin-when-cross-origin" | ("no-referrer" | "no-referrer-when-downgrade" | "origin" | "origin-when-cross-origin" | "same-origin" | "strict-origin" | "strict-origin-when-cross-origin")[] | undefined) => string | undefined) => ResponseHeader | undefined;
export {};