javascript - 使用对象在 JavaScript 中添加多个 "public functions"

Question

众所周知，在 JavaScript 中没有实际的类。

但是，您可以使用一个简单的函数来创建一个类似于设置的类。

例如:

var Person = function(name){//class like function
    this.name = name;//public 

    var display = function(text){//private
        return text;
    }

    this.getDressed = function(){//public
        return display(this.name + " needs to get dressed.");
    }

};
var person = new Person("John"),
    name = person.name,//returns "John"
    dressed = person.getDressed();//returns "John needs to get dressed",
    show = person.display("Hello");//throws error "Uncaught TypeError: Object [object Object] has no method 'display'" because there is no such function because it was private.

我的“类”将有很多功能，我想知道是否有办法做类似的事情(我知道这是行不通的):

this = {
  fun1: function () {},
  fun2: function () {},
  fun3: function () {}
}

因为我发现这样做:

this.fun1 = function(){};
this.fun2 = function(){};
this.fun3 = function(){};

很丑。有没有办法将我的所有函数保存在一个对象中，然后附加到 this？

Answer 1

如果你不需要访问私有(private)成员，你可以这样做:

function Person(){
    //stuff
}

Person.prototype = {
    fun1:function(){},
    fun2:function(){},
    //etc
};

您仍然可以从原型(prototype)函数中访问 this。

或者，您可以这样做:

function Person(name){
   var display = function(){//stuff};

   return {
       name: name,
       fun1: function(){},
       fun2: function(){}
   };
}