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

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

export default class FormComponent<P, S = void> extends Component<P, S> {
    static contextTypes = {
        intl: intlShape,
    };

    /**
     * Formats message resolving intl translations
     *
     * @param {string|object} message - message string, or intl message descriptor with an `id` field
     *
     * @return {string}
     */
    formatMessage(message: string | MessageDescriptor): string {
        if (message && message.id) {
            if (this.context && this.context.intl) {
                message = this.context.intl.formatMessage(message);
            } else {
                return '';
            }
        }

        return ((message: any): string);
    }

    /**
     * Focuses this field
     */
    focus() {
    }

    /**
     * A hook, that called, when the form was submitted with invalid data
     * This is usefull for the cases, when some field needs to be refreshed e.g. captcha
     */
    onFormInvalid() {
    }
}