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

Creating loose coupling among modules


In a modular design, an application is often created using many modules. In order for these modules to work together, we need to create coupling among them, without the modules being tightly dependent on each other.

Let's create an application based on a few simple modules and have the modules interact with each other in a loosely coupled manner. Of course, we will keep this application very simple for now. In later chapters, we will take the concepts utilized in this application and build upon them to create our fully modularized application ecosystem.

I'm making the safe assumption here that our future application will consist of many separate modules, with each one of them being responsible for doing a very specific task.

We will start by creating our core application module and calling it ApplicationInitModule. Usually, the very first step in running an application is to take care of the application's initialization tasks. Our ApplicationInitModule...