js封装

常规封装

function Person (name,age,sex){
    this.name = name;
    this.age = age;
    this.sex = sex;
}

Pserson.prototype = {
    constructor:Person,
    sayHello:function(){
        console.log('hello');
    }
}

闭包封装

var Person = (function(){

//静态私有属性方法

var home = "China";

function sayHome(name)

{

console.log(name + "'s home in " + home);

}

//构造函数

function _person(name, age){

var _this = this;

//构造函数安全模式，避免创建时候丢掉new关键字

if(_this instanceof _person){

//共有属性, 方法

_this.name = name;

_this.getHome = function(){

//内部访问私有属性，方法

sayHome(_this.name);

};

_this.test = sayHome; //用于测试 //构造器

_this.setAge = function(age){ _this.age = age + 12;

}(age);

}

else{ return new _person(name, age); }

}

//静态共有属性方法

_person.prototype = {

constructor: _person,

drink: "water",

sayWord: function(){

console.log("ys is a boy");

} }

return _person;

})();