export declare const RELATIVE_URL_BASE = "https://placeholder.local";
export declare const ABSOLUTE_URL_PATTERN: RegExp;
export declare const URL_SCHEME_PATTERN: RegExp;
export declare const HTTP_URL_PATTERN: RegExp;
export declare const PROTOCOL_RELATIVE_URL_PATTERN: RegExp;
export declare const URL_AUTHORITY_PATTERN: RegExp;
export declare const INVALID_HREF_SCHEME_PATTERN: RegExp;