How should you inherit from EventEmitter in node?

Question

I was reading over this small article to understand inheriting from EventEmitter, but I\'m a little confused.

He does this:

function Doo         


        

Answer 1

The Node v6.3.1 documentation states about util.inherits(constructor, superConstructor):

Usage of util.inherits() is discouraged. Please use the ES6 class and extends keywords to get language level inheritance support. Also note that the two styles are semantically incompatible.

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The following code shows how to inherit from EventEmitter with Typescript:

import { EventEmitter } from "events"

class Person extends EventEmitter {
    constructor(public name: string) {
        super()
    }
}

let person = new Person("Bob")
person.on("speak", function (said: string) {
    console.log(`${this.name} said: ${said}`)
})
person.emit("speak", "'hello'") // prints "Bob said: 'hello'"

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The previous code will transpile into the following ES6 code:

"use strict";
const events = require("events");
class Person extends events.EventEmitter {
    constructor(name) {
        super();
        this.name = name;
    }
}
let person = new Person("Bob");
person.on("speak", function (said) { console.log(`${this.name} said: ${said}`); });
person.emit("speak", "'hello'");