Detailed explanation of various ways to create objects in JS_javascript skills

1. Built-in object creation

var girl=new Object(); 
  girl.name='hxl'; 
  console.log(typeof girl); 

2.Factory pattern, parasitic constructor pattern

function Person(name){ 
    var p=new Object();//内部进行实例化 
    p.name=name; 
    p.say=function(){ 
      console.log('my name is '+ p.name); 
    } 
    return p;//注：一定要返回 
} 
var girl=Person('haoxioli'); 
girl.say(); 

3. Constructor creation

var Product=function(name){ 
    this.name=name; 
    this.buy=function(){ 
      console.log('我衣服的牌子是'+this.name); 
    } 
} 
  var pro=new Product('真维斯'); 
  pro.buy(); 

4.Prototype creation, disadvantage: each attribute in the instance may be different

var Role=function(){} 
  Role.prototype.name={nickName:'昵称'}; 
  var boy=new Role(); 
  boy.name.nickName='刘晓兵'; 
  console.log(boy.name.nickName);//刘晓兵 
  var girl=new Role(); 
  girl.name.nickName='郝晓利'; 
  console.log(boy.name.nickName);//郝晓利,因为实例对象可以修改原型中的引用对象的值 
  console.log(girl.name.nickName);//郝晓利 

5.Mixed mode: prototype + construction, you can put the properties that cannot be modified by the instance in the constructor, and the properties that can be modified in the prototype

var Role=function(){ 
    this.name={nickName:'aaa'}; 
  } 
  Role.prototype.age=30; 
  var boy=new Role(); 
  boy.name.nickName='boy'; 
  console.log(boy.name.nickName);//boy 
  var girl=new Role(); 
  girl.name.nickName='girl'; 
  console.log(boy.name.nickName);//boy,实例不会修改构造函数中的值 
  console.log(girl.name.nickName);//girl 

6.Literal form

var cat={ 
    name:'lucy', 
    age:3, 
    sex:'母'
  };//将对象转换成字符串 
  console.log(JSON.stringify(cat));//{"name":"lucy","age":3,"sex":"母"} 
  var dog='{"name":"john","sex":"公"}'; 
  console.log(JSON.parse(dog).name);//将字符串转为对象 

7.Copy mode

function extend(tar,source){ 
    for(var i in source){ 
      tar[i]=source[i]; 
    } 
    return tar; 
  } 
  var boy={name:'醉侠客',age:20}; 
  var person=extend({},boy); 
  console.log(person.name); 

8. Third-party framework

//先引入包 
<script src='js/base2.js'></script> 
//base2框架，Base.extend及constructor都是固定用法 
  var Animal=Base.extend({ 
    constructor:function(name){ 
      this.name=name; 
    }, 
    say:function(meg){ 
      console.log(this.name+":"+meg); 
    } 
  }); 
  new Animal('lily').say('fish'); 

Another third-party framework

<script src='js/simplejavascriptinheritance.js'></script> 
//simplejavascriptinheritance框架,Class.extend及init都是固定用法 
  var Person=Class.extend({ 
    init:function(name){ 
      this.name=name; 
    } 
  }); 
  var p=new Person(); 
  p.name='over'; 
  console.log(p.name); 

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