I'm experimenting with ES6 classes and noticed I was unable to use util.inherits to inherit EventEmitter into the prototype of my class.

'use strict';
var util = require('util');
var EventEmitter = require('events').EventEmitter;

class x {
    constructor() {
        EventEmitter.call(this);
    }
    emitEvent() {
        this.emit('event emitted!');
    }
}

util.inherits(x, EventEmitter); // Fails

The error is TypeError: Cannot assign to read only property 'prototype' of class x { constructor() { EventEmitter.call(this); } emitEvent() { this.emit('event emitted!'); } }

I was able to get inheritance to work using class x extends EventEmitter, but using extends means my class can't be a subclass of anything besides EventEmitter unless I make EventEmitter the root class.

Thoughts on this?