Creating a store

As you learned earlier, stores manage data in your Flux architecture. They provide that data to the React components. We'll create a simple store that manages a new tweet that our application receives from Twitter.

Create a new folder called stores in our project's ~/snapterest/source/stores directory. Then, create the TweetStore.js file in it:

import AppDispatcher from '../dispatcher/AppDispatcher';
import EventEmitter from 'events';

let tweet = null;

function setTweet(receivedTweet) {
  tweet = receivedTweet;
}

function emitChange() {
  TweetStore.emit('change');
}

const TweetStore = Object.assign({}, EventEmitter.prototype, {
  addChangeListener(callback) {
    this.on('change', callback);
  },

  removeChangeListener(callback) {
    this.removeListener('change', callback);
  },

  getTweet() {
    return tweet;
  }
});

function handleAction(action) {
  if (action.type === 'receive_tweet') {
  ...