JavaScript定义类的方法

[suoyuesmile]

参考：JavaScript定义类（class）的三种方法

[suoyuesmile]

1. 构造函数法

function Cat(){
	this.name = "大毛";
}
var cat1 = new Cat();
alert(cat1.name); //大毛

Cat.prototype.makeSound = function(){
	alert("喵喵喵");
}

2. Object.create()法

var Cat = {
	name : "大毛";
	makeSound：function(){alert("喵喵喵");}
};
var cat1 = Object.create(Cat);
alert(cat1.name); //大毛
cat1.makeSound(); //喵喵喵
//新式浏览器

3. 极简主义法

var Cat = {
	createNew : function(){
		//some code here
		var cat = {};
		cat.name = "大毛";
		cat.makeSound = function(){ alert("喵喵喵");};
		return cat;
	}
};
var cat1 = Cat.createNew();
cat1.makeSound();//喵喵喵
//继承
var Animal = {
	createNew: function(){
		var animal = {};
		animal.sleep = function(){
			alert("睡懒觉");
		};
	}
};
var Cat = {
	createNew : function(){
		//some code here
		var cat = {};
		Var cat = Animal.createNew();//继承
		cat.name = "大毛";//私有
		cat.makeSound = function(){ alert("喵喵喵");};
		return cat;
	}
};
var cat1 = Cat.createNew();
cat1.sleep();
//私有属性和方法，只要不定义在cat上属性和方法都是私有的
//数据共享
var Cat = {
	sound : "喵喵";
	createNew : function(){
		var cat = {};
		cat.makeSound = function(){
			alert(Cat.sound);
		};
		cat.changeSound = function(x){
			Cat.sound = x;
		};
		return cat;
	}
};