创建一个类Person的简单实例

function Person(props){this.name=props.name||'匿名';this.age=props.age||20;this.friends=props.friends||'无';}Person.prototype.sayhi=function(){console.log("你好！"+this.name);}Person.prototype.addFriend=function(newf){this.friends.push(newf);console.log(this.friends);}function createPerson(props) {  return new Person(props || {});}

var xiaozhang=createPerson({name:'小张',age:22,friends:["小李","小王"]});xiaozhang.sayhi();//你好！小张xiaozhang.addFriend('James');//["小李", "小王", "James"]