How to subscribe to events in another node.js module?

Question

JavaScript

There is a main module in which the EventEmmiter is created, how to subscribe to this event in the connected module?
The option with passing as a parameter is no longer possible, because this module is not connected directly, but through a chain of connections

Answer 1

You can explicitly put your EventEmitter in the global scope:
Well, access it through global.ee everywhere.
But this is not very good for the architecture. It would be better not to use modules as business entities, but to export some functions, factories, classes from them, then the problem “the module is not connected directly” will cease to make sense.

Answer 2

ioc

Answer 3

// module.js
module.exports = (ee) => {
    ee.on('test', n => console.log(n));
}

//app.js
const {EventEmitter} = require('events');
const ee = new EventEmitter();
require('./module.js')(ee);
...
ee.emit('test');