accounts-frontend/src/components/ui/form/FormInputComponent.js

// @flow
import type { MessageDescriptor } from 'react-intl';
import React from 'react';

import FormComponent from './FormComponent';
import FormError from './FormError';

type Error = string | MessageDescriptor;

export default class FormInputComponent<P, S = void> extends FormComponent<P & {
    error?: Error,
}, S & {
    error?: Error,
}> {
    componentWillReceiveProps() {
        if (this.state && this.state.error) {
            Reflect.deleteProperty(this.state, 'error');

            this.setState(this.state);
        }
    }

    renderError() {
        const error = this.state && this.state.error || this.props.error;

        return <FormError error={error} />;
    }

    setError(error: Error) {
        this.setState({error});
    }
}