Nodejs Events

Events in Node.js

The EventEmitter Object

• You can assign event handlers to your own events with the EventEmitter object.
• In the example below we have created a function that will be executed when a "scream" event is fired.
• To fire an event, use the emit() method.

var events = require('events');
var eventEmitter = new events.EventEmitter(); 

//Create an event handler: 
var myEventHandler = function () { 
 console.log('I hear a scream!'); 
} 

//Assign the event handler to an event:

eventEmitter.on('scream', myEventHandler); 

//Fire the 'scream' event: 
eventEmitter.emit('scream');