javascript 封装

常规封装 (将具体初始化放在构造函数里面)

function Fruit (name){
  this.name = name;
}

Fruit.prototype = {
  constructor: Fruit, //将Fruit.prototype的构造函数指向Fruit
  consoleName:function(){
    console.log(this.name)
  }
}

常规封装（放一个初始化方法在构造函数里面）

function Fruit (info){
  this.init(info);
}

Fruit.prototype = {
  constructor: Fruit, //将Fruit.prototype的构造函数指向Fruit
  init: function(info){
    this.name = info.name;
  },
  consoleName:function(){
    console.log(this.name)
  }
}

类jQuery 封装

var Fruit = function (info){
  return new Fruit.prototype.init(info);
}  

Fruit.prototype = {
  constructor: Fruit,
  init:function(info){
    this.name = info.name;
  }
}

Fruit.prototype.init.prorotype = Fruit.prototype; //将init的原型对象指定为Fruit的原型对象

var Fruit = function (info){
  return new Fruit.fn.init(info);
}  

Fruit.fn = Fruit.prototype = {
  constructor: Fruit,
  init:function(info){
    this.name = info.name;
  }
}

Fruit.fn.init.prorotype = Fruit.fn; 

var Fruit = (function(window){
  var Fruit = function (info){
    return new Fruit.fn.init(info);
  }  

  Fruit.fn = Fruit.prototype = {
    constructor: Fruit,
    init:function(info){
      this.name = info.name;
    }
  }
  Fruit.fn.init.prorotype = Fruit.fn; 
  return Fruit;
})()

原文链接：http://www.cnblogs.com/likeFlyingFish/p/6175734.html