1.使用工厂模式创建对象

function  createObj(name,age,grade){  var obj=new Object();  obj.name=name;  obj.age=age;  obj.grade=grade;  return obj}//调用console.log(createObj('Jessica',13,4));  //{name: "Jessica", age: 13, grade: 4}

2.使用构造函数模式创建

function Person(name,age,grade){  this.name=name;  this.age=age;  this.grade=grade;}//调用var person=new Person('Jessica',13,4);console.log(person) //{name: "Jessica", age: 13, grade: 4}

3.使用原型模式创建

function Person(){}Person.prototype.name="Jessica";Person.prototype.age=13;Person.prototype.grade=4;Person.prototype.frends=['Anna'];Person.prototype.sayName=function () {  alert(this.name);};//调用var person1=new Person();console.log(person1);  //输出{}console.log(person1.name);  //输出"Jessica"console.log(person1.frends.push('Alex'));var person2=new Person();console.log(person2.frends);  //["Anna","Alex"]console.log(person1.hasOwnProperty("name")); //falseperson1.name="Bob";console.log(person1.hasOwnProperty("name")); //true

4.组合使用构造函数模式和原型模式

function Person(name,age,grade){  //构造函数模式用于定义实例属性  this.name=name;  this.age=age;  this.grade=grade;  this.friends=['Anna','Alex'];}Person.prototype={  //原型模式用于定义共享的方法和属性  constructor:Person,  sayName:function(){    console.log(this.name);  }}var person1 = new Person("Nicholas", 15, 5);var person2 = new Person("Greg", 16, 6);person1.friends.push('Jessica');console.log(person1.friends);  //["Anna","Alex","Jessica"];console.log(person2.friends);  //["Anna","Alex"];

5.动态原型模式

function Person(name,age,grade){  this.name=name;  this.age=age;  this.grade=grade;  if(typeof this.sayName!='function'){    Person.prototype.sayName=function(){      console.log(this.name)    }  }}var person= new Person('Jessica',12,4);person.sayName();  //Jessicavar person1= new Person('July',12,4);person1.sayName(); //July

6.寄生构造函数模式

function SpecialArray(){  //创建数组  var values =new Array();  //添加值  values.push.apply(values,arguments);  //添加方法  values.toPipedString=function(){    return this.join("****")  }  return values;}var colors =new SpecialArray('11','22','33');console.log(colors.toPipedString());  //"11****22****33"

7.稳妥构造函数模式

function Person(name,age,grade){  var o =new Object();      o.sayName=function(){    console.log(name);  };  return o;}var friend=Person('Jessica',12,5);friend.sayName();  //Jessica

各种模式的优缺点如下图: