/*!
 * Axios Cache Interceptor 1.8.3
 * (c) 2021-present Arthur Fiorette & Contributors
 * Released under the MIT License.
 */
export declare const Header: {
    /**
     * ```txt
     * If-Modified-Since: <day-name>, <day> <month> <year> <hour>:<minute>:<second> GMT
     * ```
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-Modified-Since
     */
    readonly IfModifiedSince: "if-modified-since";
    /**
     * ```txt
     * Last-Modified: <day-name>, <day> <month> <year> <hour>:<minute>:<second> GMT
     * ```
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Last-Modified
     */
    readonly LastModified: "last-modified";
    /**
     * ```txt
     * If-None-Match: "<etag_value>"
     * If-None-Match: "<etag_value>", "<etag_value>", …
     * If-None-Match: *
     * ```
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-None-Match
     */
    readonly IfNoneMatch: "if-none-match";
    /**
     * ```txt
     * Cache-Control: max-age=604800
     * ```
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control
     */
    readonly CacheControl: "cache-control";
    /**
     * ```txt
     * Pragma: no - cache;
     * ```
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Pragma
     */
    readonly Pragma: "pragma";
    /**
     * ```txt
     * ETag: W / '<etag_value>';
     * ETag: '<etag_value>';
     * ```
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag
     */
    readonly ETag: "etag";
    /**
     * ```txt
     * Expires: <http-date>
     * ```
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Expires
     */
    readonly Expires: "expires";
    /**
     * ```txt
     * Age: <delta-seconds>
     * ```
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Age
     */
    readonly Age: "age";
    /**
     * Used internally as metadata to mark the cache item as revalidatable and enabling
     * stale cache state Contains a string of ASCII characters that can be used as ETag for
     * `If-Match` header Provided by user using `cache.etag` value.
     *
     * ```txt
     * X-Axios-Cache-Etag: "<etag_value>"
     * ```
     */
    readonly XAxiosCacheEtag: "x-axios-cache-etag";
    /**
     * Used internally as metadata to mark the cache item as revalidatable and enabling
     * stale cache state may contain `'use-cache-timestamp'` if `cache.modifiedSince` is
     * `true`, otherwise will contain a date from `cache.modifiedSince`. If a date is
     * provided, it can be used for `If-Modified-Since` header, otherwise the cache
     * timestamp can be used for `If-Modified-Since` header.
     *
     * ```txt
     * X-Axios-Cache-Last-Modified: <day-name>, <day> <month> <year> <hour>:<minute>:<second> GMT
     * X-Axios-Cache-Last-Modified: use-cache-timestamp
     * ```
     */
    readonly XAxiosCacheLastModified: "x-axios-cache-last-modified";
    /**
     * Used internally as metadata to mark the cache item able to be used if the server
     * returns an error. The stale-if-error response directive indicates that the cache can
     * reuse a stale response when any error occurs.
     *
     * ```txt
     * XAxiosCacheStaleIfError: <seconds>
     * ```
     */
    readonly XAxiosCacheStaleIfError: "x-axios-cache-stale-if-error";
};
//# sourceMappingURL=headers.d.ts.map