My question is not about how to keep reference intact, but why
module.exports and exports point to different object when only assign
module.exports
在 2013年10月16日星期三UTC+8下午4时29分59秒，greelgorke写道：
>
> there is no magic. at all. what whatever is assigned to module.exports is
> returned to requiring code. the exports is initally set up to be a
> shortcut reference to module.exports if you assign something to
> module.exports you have to assign the same thing to exports if you want
> to keep this reference intact. so if you want to re-assign this do it this
> way:
>
> module.exports = exports = myNewGreatExports
>
> so if you do so, everything is ok and in place and you can still use the
> shortcut. You also can just not use the shortcut and use always the longer
> form.
>
> Am Mittwoch, 16. Oktober 2013 08:40:38 UTC+2 schrieb yougen zhuang:
>>
>> Not exactly. If just setting "exports" would not work, for example,
>> exports = Rect, than in another file, assuming main.js, var Rect =
>> require('Rect'), var rect = new Rect() will fail.
>>
>> 在 2013年10月15日星期二UTC+8下午8时33分15秒，greelgorke写道：
>>>
>>> module.exports and exports are referencing the same object. if you do
>>> module.exports = foo, both point to different objects. if you want to
>>> assign to module.exports and keep the shortcut exports correct do this
>>>
>>> module.exports = exports = foo
>>>
>>> simple reference handling, there is no magic behind.
>>>
>>> Am Dienstag, 15. Oktober 2013 12:22:29 UTC+2 schrieb yougen zhuang:
>>>>
>>>> Before assign value to exports, module.exports === exports, but after
>>>> assign value, they're not equal. In my view, they're point to the same
>>>> reference.
>>>> BTW, if I modify to module.exports.Rect = Rect, then module.exports ===
>>>> exports
>>>>
>>>> function Rect(w,h) {
>>>> this.w = w;
>>>> this.h = h;
>>>> };
>>>>
>>>> Rect.prototype.area = function(){
>>>> return this.w*this.h;
>>>> };
>>>>
>>>> console.log(module.exports === exports);//true
>>>> module.exports = Rect;
>>>> console.log(module.exports);
>>>> console.log(exports);
>>>> console.log(module.exports === exports);//false
>>>>
>>>>
>>>>
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