Iris/src/js/components/ErrorMessage.js

import React, { memo } from 'react';

export default memo((props) => (
  <div className={`error-message${props.type ? ` error-message--${props.type}` : ''}`}>

    <i className="error-message__icon icon icon--material">error</i>

    <h4 className="error-message__title">
      {props.title ? props.title : 'Unknown error'}
    </h4>

    <div className="error-message__content">
      {props.children}
    </div>

  </div>
));