Node. js Custom Event instance _ node. js-js tutorial

This article mainly introduces Custom Event instances in node. js. A simple example. For more information, see the EventEmitter that inherits events, then you can register the event through the on; emit triggers the event and removeListener removes the event. A simple example is as follows:

Var util = require ('util'); var Et = require ('events '). eventEmitter; function Ticker () {var self = this; setInterval (function () {self. emit ("tick") }, 1000);} util. inherits (Ticker, Et); var ticker = new Ticker (); ticker. on ("tick", function () {console. log ("ticker ");});

In this way, the custom Ticker has the ability to customize events.