具有自定义参数和 EventEmitter 的 Node.JS 模块不起作用

Question

您好，我正在尝试创建一个基于 Node.JS 的模块，该模块将在需要时接受一个参数，并且它将能够引发调用者模块能够在我的方法上监听的事件，如下所示

let events = require('events');

exports.Inititalize = function (parameter) 
{
    let emitter = events.EventEmitter();

    //some initialization code here
    //at some point need to raise event e.g.
    //emitter.emit('status', 'Hi there i am an event, you provided ' + parameter)

    return emitter;
}

调用者脚本如下调用它

let myModule = require('./mymodule.js').Inititalize('my parameter');

myModule.on('status', function (status) { //TypeError: Cannot read property 'on' of undefined but as far as i know "on" is the part of EvenEmitter that i returned
    console.log(status);
});

我做错了什么？

Answer 1

您似乎忘记了new 关键字：

let emitter = new events.EventEmitter();