import type { FormValue } from "./value.js";
/**
 * A date time form value.
 */
export interface FormDateTime<TOptional extends boolean = false> extends FormValue {
    type: "date-time";
    /**
     * Whether this date time is optional, i.e. allows `undefined` values.
     */
    isOptional: TOptional;
    /**
     * Make this date time optional, i.e. allow `undefined` values.
     */
    optional(): FormDateTime<true>;
    /**
     * Set the minimum value of this date time.
     */
    min(value: Date): FormDateTime<TOptional>;
    /**
     * Set the maximum value of this date time.
     */
    max(value: Date): FormDateTime<TOptional>;
}
/**
 * Create a new date time form value.
 */
export declare function dateTime(): FormDateTime<false>;
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