/// <reference types="react" />
import type { IFormInputValidation } from './interface';
export declare const orEmptyString: (val: any) => any;
export declare const validationClassName: (validation?: IFormInputValidation) => string;
export declare const createFakeReactSyntheticEvent: (target: {
    name?: string;
    value?: any;
}) => import("react").ChangeEvent<any>;
export declare const isStringArray: (opts: readonly any[]) => opts is string[];