Book Image

Modular Programming with JavaScript

Book Image

Modular Programming with JavaScript

Overview of this book

Programming in the modular manner is always encouraged for bigger systems—it is easier to achieve scalability with modular programming. Even JavaScript developers are now interested in building programs in a modular pattern. Modules help people who aren’t yet familiar with code to find what they are looking for and also makes it easier for programmers to keep things that are related close together. Designing and implementing applications in a modular manner is highly encouraged and desirable in both simple and enterprise level applications. This book covers some real-life examples of modules and how we can translate that into our world of programming and application design. After getting an overview of JavaScript object-oriented programming (OOP) concepts and their practical usage, you should be able to write your own object definitions using the module pattern. You will then learn to design and augment modules and will explore the concepts of cloning, inheritance, sub-modules, and code extensibility. You will also learn about SandBoxing, application design, and architecture based on modular design concepts. Become familiar with AMD and CommonJS utilities. By the end of the book, you will be able to build spectacular modular applications in JavaScript.
Table of Contents (17 chapters)
Modular Programming with JavaScript
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
2
Review of Important JavaScript OOP Concepts
Index

Simple augmentation of ImagesInc_GlobalData


As you may recall, we used our ImagesInc_GlobalData module (previously named GlobalData) to store application-level data for us. This module also provided a couple of interfaces, so other pieces of the application could have access to the private data that we had stored in this module.

Let's create another JavaScript file, which adds more data and a new interface to this module. We can call this file Modules_2.js and add it to the list of JavaScript files that our main page loads at runtime, as follows:

<script type="text/javascript" src="js/Modules.js" ></script>
<script type="text/javascript" src="js/Modules_2.js" ></script>

As you can see, this file is added as any other JavaScript file would be in our index.html. However, one thing to notice in the preceding code is the order that the two module files have been added. This order is important and we will talk more about it shortly, but for now, keep in mind that our ImageInc_GlobalData...