JS——构造对象的几种模式

1）构造函数模式。

        function Person(name, job) { 
             this.name = name 
               this.job = job 
               this.sayName = function() { 
                  console.log(this.name) 
              } 
        } 
        var person1 = new Person('Jiang', 'student') 

2）工厂模式

function createPerson(name,age,job){
    var o = new Object();
    o.name = name;
    o.age = age;
    o.job = job;
    o.sayName = function(){
        alert(this.name);
    }
    return o;
}
var person1 = createPerson("zhangsan",29,"soft engineer");
var person2 = createPerson("lisi",30,"hardware engineer");

3）原型模式

function Person(){}
Person.prototype.name="小米";
Person.prototype.showName=function(){
          alert(this.name);
}
var person1=new Person();
person1.showName();

缺点：属性共享

4）混合模型

构造函数模式定义实例属性，而原型模式用于定义方法和共享的属性

function CreatePerson(name){
this.name=name;
}
CreatePerson.prototype.showName=function(){
        alert(this.name);
}
var p1=new CreatePerson('小白');
p1.showName();
var p2=new CreatePerson('小绿');
p2.showName();