/// <reference types="react" />
import * as React from 'react';
export interface RestorableTextFieldProps {
    className?: string;
    label: string;
    initialValue: string;
    /** null => valid, otherwise error message */
    validate?: (value: string) => string | null;
    onChanged?: (value: string) => void;
}
export interface RestorableTextFieldState {
    value: string;
}
export declare class RestorableTextField extends React.Component<RestorableTextFieldProps, RestorableTextFieldState> {
    constructor(props: RestorableTextFieldProps);
    render(): JSX.Element;
    private validate;
    private onChanged;
    private restore;
}
/** Validate number with `isNan`. */
export declare class NumberTextField extends React.Component<RestorableTextFieldProps, any> {
    constructor(props: RestorableTextFieldProps);
    render(): JSX.Element;
    private validateNumber(value);
}