发布订阅模式

function Person(){

this.events={}

}

Person.prototype.on=function(eventname,callback){

if(this.events[eventname]){

this.events[eventname].push(callback)

}else{

this.events[eventname]=[callback]

}

}

Person.prototype.emit=function(eventname,...args){

if(this.events[eventname]){

this.events[eventname].forEach(function(cb){

 

cb(...args)

})

}

 

}

var walk=function(name,name1){

console.log(name+name1+'正在行走')

}

var person1=new Person();

person1.on('白天',walk);

person1.emit('白天','杨豪','张晶晶')