title: What is the difference between addListener(event, listener) and on(event, listener) method in node.js?
body: <p>Here i cannot understand what is the basic difference between these two methods.</p>
  
  <pre><code>var events = require('events');
  var eventEmitter = new events.EventEmitter();
  
  
  
  var listner1 = function listner1() {
      console.log('listner1 executed.');
  }
  
  var listner2 = function listner2() {
      console.log('listner2 executed.');    
  }
  
  eventEmitter.addListener('connection', listner1);
  
  eventEmitter.on('connection', listner2);
  
  eventEmitter.emit('connection');
  </code></pre>