Javascript对象如何引用值本身？ [英] How can a Javascript object refer to values in itself?

问题描述

假设我有以下javascript：

Lets say I have the following javascript:

var obj = {
 key1 : "it ",
 key2 : key1 + " works!"
};
alert(obj.key2);

key1未定义时出现此错误。我试过了

This errors with "key1 is not defined". I have tried

this.key1
this[key1]
obj.key1
obj[key1]
this["key1"]
obj["key1"]

并且它们似乎永远不会被定义。

and they never seem to be defined.

如何让key2引用key1的值？

How can I get key2 to refer to key1's value?

推荐答案

也许您可以考虑将属性移除到函数中。我的意思是这样的：

Maybe you can think about removing the attribute to a function. I mean something like this:

var obj = {
 key1 : "it ",
 key2 : function() {return this.key1 + " works!";}
};

alert(obj.key2());

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