你如何在node.js中共享EventEmitter？ [英] How do you share an EventEmitter in node.js?

问题描述

我想从一个文件/模块/脚本中发出事件，并在另一个文件/模块/脚本中侦听它们。如何在不污染全局命名空间的情况下在它们之间共享发射器变量？

I want to emit events from one file/module/script and listen to them in another file/module/script. How can I share the emitter variable between them without polluting the global namespace?

谢谢！

推荐答案

您可以将参数传递给require调用：

You can pass arguments to require calls thusly:

var myModule = require('myModule')(Events)

然后在myModule中

And then in "myModule"

module.exports = function(Events) {
    // Set up Event listeners here
}

话虽如此，如果你想共享一个事件发射器，创建一个发射器对象，然后在require调用中传递给你的文件/模块/脚本。

With that said, if you want to share an event emitter, create an emitter object and then pass to your "file/module/script" in a require call.

虽然正确，但这是代码味道，因为您现在将模块紧密耦合在一起。相反，请考虑使用每个模块中可能需要的集中式事件总线。

Though correct, this is a code smell as you are now tightly coupling the modules together. Instead, consider using a centralized event bus that can be required into each module.

这篇关于你如何在node.js中共享EventEmitter？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！