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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');