import { JsonSchema } from '@jsonforms/core';
import { ReactElement } from 'react';
import { JsonFormsDataValue } from './types';
/**
 * Builds the `error` prop for a single-value input where an empty value (`null` or `''`) is never a
 * valid entry (enum, oneOf, date, time, number, boolean). When the field is empty: a nullable field
 * is valid, so the option-mismatch errors are hidden; a non-nullable field is missing, so a single
 * "is a required property" error is shown. A non-empty value passes its errors through unchanged.
 *
 * @param value the current value; `null` or `''` counts as empty
 * @param error the rendered error nodes from `useCommonProps`
 * @param schema the control schema; a `type` that includes `'null'` marks the field nullable
 * @returns the `error` prop for the input
 */
export declare function useNullableErrorProps(value: JsonFormsDataValue, error: ReactElement[] | undefined, schema: JsonSchema): {
    error: ReactElement[] | string | undefined;
};