hartzis

// https://codepen.io/hartzis/pen/VvNGZP
class ImageUpload extends Component {
  constructor(props) {
    super(props);
    this.state = {
      file: '',
      imagePreviewUrl: ''
    };
    this._handleImageChange = this._handleImageChange.bind(this);
    this._handleSubmit = this._handleSubmit.bind(this);