export type SafeUrlProtocol = 'blob:' | 'http:' | 'https:' | 'mailto:';
export interface ResolveSafeUrlOptions {
    protocols?: readonly SafeUrlProtocol[];
    baseUrl?: string | URL;
}
/**
 * Resolve a consumer-authored URL only when its protocol is explicitly allowed.
 * Relative URLs use the current document base in browser rendering; server-side
 * callers can provide `baseUrl` when they intentionally support relative input.
 */
export declare function resolveSafeUrl(value: string | null | undefined, options?: ResolveSafeUrlOptions): string | undefined;