Node.js全局变量 [英] Node.js global variables

问题描述

我在这里问: > Node.js是否需要继承?

I asked here: Does Node.js require inheritance?

有人告诉我，可以通过省略变量来将变量设置为全局范围.

And I was told that I can set variables to the global scope by leaving out the variable.

这对我不起作用.

也就是说，以下内容不能使_在所需文件上可用.

That is, the following does not make the _ available on required files.

_ = require('underscore');

我可以使用Express.js的app.set进行设置，并使其在其他位置可用.

I can set with Express.js's app.set and have it available elsewhere though.

这应该是如何工作的吗?

Is that how this is supposed to work?

推荐答案

您可以使用 global 像这样:

You can use global like so:

global._ = require('underscore')

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