Node.js學習(6)----事件

/** * New node file */var EventEmitter=require('events').EventEmitter;var event=new EventEmitter();event.on('some_event',function(){console.log('some_event occured.');});setTimeout(function(){event.emit('some_event');},5000);//運行這段代碼,5000ms後輸出some_event occured.//其原理是event對象註冊了事件some_event的一個監聽器，//然後我們通過setTimeout在5000毫秒以後向event對象發送事件some_event,//此時會調用some_event監聽器