Prototypal inheritance boilerplate via @toddmotto...

prototypal.js

// IIFE, or any type of wrapper to export 
var newModule = (function () {

    // non-instance private vars
    var someVar;
    
    // @constructor
    function MyConstructor(elem, options) {
        var defaults = {};
    	this.elem = elem;
        this.options = options; // do some extend or whatever with "defaults"
    }
    
    function doSomething() {
    	// do something, obviously...
        console.log('doing something!');
    }
    
    function doAnotherThing() {
    	// do another thing, obviously...
    }
    
    MyConstructor.prototype.doSomething = doSomething;
    MyConstructor.prototype.doAnotherThing = doAnotherThing;
    
    return function (elem, options) {
    	return new MyConstructor(elem, options);
    };

})();

var instance = newModule('.elem', {
	// config Object block
});

instance.doSomething();
instance.doAnotherThing();