I have a general question about the design of JavaScript Libraries.

I am trying to consolidate common methods into one js file so they can be reused by different scripts.

I have taken a look at how the JSON library is structured and believe it was a good approach. JSON for Javascript.

So they start off creating an instance of the class:

if (!this.JSON) {
    this.JSON = {};
}

Then they do this:

(function () {
    if (typeof JSON.stringify !== 'function') {
        JSON.stringify = function (value, replacer, space) {

This is works perfect if you just want to do JSON.[function_name], but what if I want to have a more structured library such that I want: JSON.[subgroup].[function]. How would I structure my JS library in such a way?

Any links to resources are greatly appreciated, thanks.