Mastering JavaScript Design Patterns

Modules

Now that we have a complete class system, it would be good to address the global namespace discussed earlier. Again there is no first class support for namespaces but we can easily isolate functionality to the equivalent of a namespace. There are a number of different approaches to creating modules in JavaScript. We'll start with the simplest and add some functionality as we go along.

To start, we simply need to attach an object to the global namespace. This object will contain our root namespace. We'll name our namespace Westeros; the code simply looks like this:

Westeros = {}

This object is, by default, attached to the top-level object, so we need not do anything more than that. A typical usage is to first check if the object already exists, ...