augustinr

export default class Store {
  constructor(state: Object) {
    this.state = state;
    this.callbacks = [];
  }

  subscribe(callback) {
    this.callbacks.push(callback);
    return () => this._unsubscribe(callback);
  }

augustinr

class ImgWithFallBack extends Component {
  constructor() {
    super();

    this.state = { displayCallBack: false };
  }

  onError() {
    this.setState({ displayCallBack: true });
  }