Inheritance / inclusion in JS files

I tried to follow the Example , but in Espruino IDE it didn't really work.

I tried the following:

module moq_base.js

var wifi = require( "Wifi" );
function MoqBase(){};
MoqBase.prototype.ssid;
MoqBase.prototype.startPairing = function () {...}

and then "inherit":

var MoqBase = require( "moq_base" );
Moq.prototype = new MoqBase();
Moq.prototype.constructor = Moq; 
function Moq( options ) {....}

but it resulted in exceptions like

Uncaught Error: Constructor should be a function, but is Object
at line 5 col 21
Moq.prototype = new MoqBase();

I tried also to define a plain function inside the "base" module and then call it, but it also fails - function not found.

So, are there any examples / tutorials on using JS-inheritance / inlcusion for ESP?
Or, it shouldn't be used and copy & paste is my only true friend?

Thanks!