如何让CommonJS模块执行main（）（如在Python中）？ [英] How to have a CommonJS module execute its main() (as in Python)?

问题描述

我想知道是否存在一个在CommonJS模块中运行预定义函数的方法（如Node.js中使用的那样）。我写了几个充当服务/服务器的节点模块。我可以从执行各自main（）方法的控制器脚本中运行它们，但我也想自己调用它们，就像我们以前在python中那样。

I wonder if a method exists that would run a predefined function in a CommonJS module (as those used in Node.js). I wrote a couple of node modules that act as services/servers. I can run them from inside a "controller script" executing their respective main() method, but I'd like also to call them by itself, like we are used to do in python.

我认为方法是尝试了解模块是否已经被要求。

I think the way is to try to understand if the module has been REQUIREd or not.

你知道怎么做？

这相当于Python

This is the equivalent in Python

if __name__ == "__main__":
   print "Running standalone"

推荐答案

if (require.main === module) {
    console.log("running standalone");
}

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