JavaScript构造函数 [英] JavaScript constructors

问题描述

我不完全理解如何应用构造函数对这个对象创建方法：

  
 var MyObject = {
 ... 
}; 
  

我知道你可以这样做：

  
 var MyObject = new Object（）; 
 MyObject.prototype.constructor = function（props）
 {
 ... 
} 
  

或...

  
 function MyObject（prop1，prop2）
 {
 this.prop1 = prop1; 
 ... 
} 
  

我可以这样做吗？ p>

  
 var MyObject = {
 MyObject：function（prop1，prop2）
 { 
 ... 
} 
} 
 

解决方案

不，你不能，只是创建一个（静态）方法MyObject - MyObject.MyObject 。在JavaScript中，构造函数是类。类方法和属性在构造函数中使用 this。或使用 MyClass.prototype。添加到原型（在构造函数之外）。 / code>。您可以将JavaScript中的对象视为静态类。

I do not understand quite completely how to apply constructors on this object creation method:

var MyObject = {
   ...
};

I know that you can do:

var MyObject = new Object();
MyObject.prototype.constructor = function(props)
{
  ...
}

or...

function MyObject(prop1, prop2)
{
 this.prop1 = prop1;
 ...
}

Can I do something like this?

var MyObject = {
   MyObject: function(prop1, prop2)
   {
     ...
   }
}

解决方案

No, you can't, that would simply create a (static) method on MyObject -- MyObject.MyObject. In JavaScript, a constructor is the class. Class methods and properties are created either inside the constructor using this. or by adding to the prototype (outside of the constructor) using MyClass.prototype.. You can think of "objects" in JavaScript as static classes.

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