js中创建对象的5种方法

var ?dog ?= ???{ ???name: jack, ???length: 70, ???wang:function(){ ???????console.log(this.name); ???}

function ?creatdog ?(name,length) { ???var ?moudle ?= ??new ?object (); ???dog.name=name; ???dog.length=length; ???dog.wang=function（）{ ???????console.log(this.name); ???}; ???return moudle;}

function ?Dog (name,length) { ???this.name=name; ???this.length=length; ???this.wang=function() { ???????console.log(this.name); ???};}var dog1 = new Dog( ‘wangcai‘ , 80) //创建一个dog1对象Dog(‘wangcai‘, 80); ???//属性方法都给window对象，window.name=‘wangcai‘，window.wang()会输出wangcai

function ?Dog () {}Dog.prototype.name = ‘wangcai‘;Dog.prototype.length=80;Dog.prototype.wang= function () { ???console.log(this.name);};var ?dog1 = new Dog();

// dog1:name:‘wangcai‘;length:80;f:wang()

function Dog (name, length) { ????this.name = name; ????this.length = length; } Dog.prototype = { ????hobby: [‘running‘,‘eat‘]; ????wang: function () { 
　　　　console.log(this.name);
　　 }}; var dog1 = new Dog(‘wangcai‘, 80); //dog1:‘wangcai‘,80; __proto__: [‘running‘,‘eat‘],wang var dog2 = new Dog(‘defu‘, );70 //dog2:‘defu‘,70;__proto__: [‘running‘,‘eat‘],wang