subscribe.js

// Subscribe to receive notifications
store.subscribe(action => {
  
  // Check the type of action
  if(action == ‘TWEETS_RECEIVED’) {
    
    // Clear notification
    document.getElementById(‘notification’).innerText = ‘’;
    
    // Construct the HTML for the tweets list
    const tweets = store.getState().tweets.map(tweet => {
      return`
        <li>
          <p class=”username”>${tweet.username}</p>
          <p class=”message”>${tweet.message}</p>
        </li>
      `; 
    })
    
    // Add tweets to UI
    document.getElementById(‘tweets’).innerHTML = tweets;
  }
});