javascript模块导出模式 [英] javascript module exports pattern

问题描述

有人可以解释一下导出变量的内容：

从backbone.js复制，我也注意到spine.js使用相同的模式。

https://gist.github.com/1375748

  var Backbone; 
 if（typeof exports！=='undefined'）{
 Backbone = exports; 
} else {
 Backbone = root.Backbone = {}; 
} 
  

解决方案

该模块模式是 CommonJS 规范称为 CommonJS模块：

在一个模块中，有一个名为exports的自由变量，这是一个
对象，模块可以在执行时添加其API。

所以基本上添加到导出对象定义您的模块暴露的API。

can someone please explain what's the exports variable for:

copied from backbone.js, I also noticed spine.js uses the same pattern.

https://gist.github.com/1375748

var Backbone;
if (typeof exports !== 'undefined') {
    Backbone = exports;
} else {
    Backbone = root.Backbone = {};
}

解决方案

That module pattern is part of the CommonJS specification called CommonJS Modules:

In a module, there is a free variable called "exports", that is an object that the module may add its API to as it executes.

So basically adding to the exports object defines the API your module exposes.

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