import { type Temporal } from "temporal-polyfill";
export type SupportedTemporal = Temporal.PlainDate | Temporal.ZonedDateTime;
/** Detects the Temporal value types that form-state treats as builtins. */
export declare function isSupportedTemporal(value: unknown): value is SupportedTemporal;
/** Compares supported Temporal values with Temporal's `.equals(...)` semantics. */
export declare function areSupportedTemporalValuesEqual(a: unknown, b: unknown): boolean | undefined;