import { listKeys } from './store';
import type { Domain, SupportInfo } from './types';
/** Does the index know about this feature at all? */
export declare function hasFeature(domain: Domain, key: string): boolean;
/**
 * MDN documentation URL for a known feature: the explicit BCD `mdn_url` when
 * present, otherwise a deterministic best-effort URL. `null` if the feature is
 * not in the index.
 */
export declare function getMdnUrl(domain: Domain, key: string): string | null;
/** Full normalized per-browser support map for a feature. */
export declare function getSupport(domain: Domain, key: string): Record<string, SupportInfo> | null;
/** Normalized support for a single browser. Throws on an unknown browser key. */
export declare function getBrowserSupport(domain: Domain, key: string, browser: string): SupportInfo | null;
/**
 * Minimum version that added the feature in a browser. Returns the version
 * string, or `null` when supported since forever / unsupported / unknown.
 * Throws on an unknown browser key.
 */
export declare function getMinVersion(domain: Domain, key: string, browser: string): string | null;
/**
 * Whether a feature is supported in a browser, optionally gated on a target
 * version. Unknown features are treated as unsupported; an unknown browser key
 * throws (so a typo can never read as a silent pass).
 */
export declare function isSupported(domain: Domain, key: string, browser: string, version?: string): boolean;
/** All indexed keys for a domain (handy for enumeration / autocomplete). */
export { listKeys };