events - How to use JavaScript EventTarget?

Question

I would like to create a custom event emitter in my client-side programs. I am referencing this (sparse) documentation for EventTarget

My implementation attempt

var Emitter = function Emitter() {
  EventTarget.call(this);
};

Emitter.prototype = Object.create(EventTarget.prototype, {
  constructor: {
    value: Emitter
  }
});

My desired usage

var e = new Emitter();

e.addEventListener("hello", function() {
  console.log("hello there!");
});

e.dispatchEvent(new Event("hello"));
// "hello there!"

Where it fails

var e = new Emitter();
// TypeError: Illegal constructor

What am I doing wrong?

---

Update

The following is possible, but it's a hack that depends on a dummy DOMElement

var fake = document.createElement("phony");
fake.addEventListener("hello", function() { console.log("hello there!"); });
fake.dispatchEvent(new Event("hello"));
// "hello there!"

I'd like to know how to do this without having to use the dummy element

Answer 1

I gave up on this awhile ago, but recently needed it again. Here's what I ended up using.

ES6

class Emitter {
  constructor() {
    var delegate = document.createDocumentFragment();
    [
      'addEventListener',
      'dispatchEvent',
      'removeEventListener'
    ].forEach(f =>
      this[f] = (...xs) => delegate[f](...xs)
    )
  }
}

// sample class to use Emitter
class Example extends Emitter {}

// run it
var e = new Example()
e.addEventListener('something', event => console.log(event))
e.dispatchEvent(new Event('something'))