Node.js publish-subscribe mode method

//导入内置模块let EventEmitter = require('events');
let util=require('util');//Man继承EventEmitterutil.inherits(Man,EventEmitter); 
//创建一个函数function Man(){}//实例化函数let man=new Man();function findGirl() {
    console.log('找新的女朋友')
}function saveMoney() {
    console.log('省钱')
}
man.on('失恋',findGirl)//失恋 ，绑定一个函数方法man.on('失恋',saveMoney)//失恋 ，绑定一个函数方法man.removeListener('失恋',findGirl); //移除省钱man.emit('失恋');

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