Modular Programming with JavaScript

Implementing module augmentation

Imagine that we have a module called ModuleA and, as a developer, you want to add more functionality to this module. However, for some reason, you decide to implement this new functionality in a completely separate module and then dynamically augment the original module with all the data and capabilities of this new module. You can achieve this as shown here:

var ModuleA = (function(coreModule){
    var someData = "this is some data to be used later";
    coreModule.someMethod = function(){
        return someData;
    };

    return coreModule;
})(ModuleA);

As you can see, we are again using the module pattern here, as the intent is to add the new functionality in a modular fashion.

In this IIFE, a reference to coreModule object is returned.. ...