了解jQuery源代码中过于简单的模块的用途

Question

I am trying to read and understand jquery source at their github repo for learning.

There I saw some overly simple codes are put into separate modules. Say, for example, arr.js at here

Which contains only the below code,

define( function() {
    "use strict";

    return [];
} );

There must be some usefullness to it as it is in jquery source.

Now, can anyone please explain what is the point of defining a module which only returns an empty array?

I mean the concept of module is to break down big complex codes into smaller reusable chunks and things like that.

Any help?

Thanks in advance.

Edit. Some Clarification

For Down voters and those who think this question is

opinion-based question and therefore not good for SO

I am trying to learn from a very popular open source library. And there I saw something which I did not clearly understand. It might be a best practice, or might be an overall great way of coding . So I asked this question to get more insight/understanding into the code. It is a technical question so I asked at SO, [where would I ask if not here?].

I DID NOT ASK FOR ANYONE'S OPINION

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Answer 1

If you look at the history of arr.js , you'll see that the original commit describes it as:

AMD-ify jQuery

https://github.com/jquery/jquery/commit/6318ae6ab90d4b450dfadf32ab95fe52ed6331cb

AMD stands for Asynchronous Module Definition. The purpose of AMD is to provide modularity in the jQuery code. Here's a good article that describes the purpose:

When we say an application is modular, we generally mean it's composed of a set of highly decoupled, distinct pieces of functionality stored in modules. As you probably know, loose coupling facilitates easier maintainability of apps by removing dependencies where possible. When this is implemented efficiently, its quite easy to see how changes to one part of a system may affect another.

https://addyosmani.com/writing-modular-js/

Answer 2

I guess to enforce the "use strict".

eg

For this module

define( function() {
    "use strict";

    return window.document;
} );

in non-strict mode you can do window.document = 10

In strict mode is an error

Cannot assign to read only property 'document' of object '#'

Or it could be just there way of creating small modules that will be easier to refactor later.