Chapter 2. Review of Important JavaScript OOP Concepts

Before we start creating and using our modules in JavaScript, it is important to have a good grasp of important Object Oriented Programming (OOP) concepts in JavaScript. We will rely on such concepts to design and implement our application modules in later chapter.

While my intent in this chapter is not to explore such conceptes in great depth, I will try to provide a good overview of some of the most important related topics.

If you feel that you are quite familiar with these concepts in JavaScript, you could skip this chapter and move on to the next one.

However, if you are not very familiar with OOP in JavaScript, even if you are familiar with similar concepts in classical object oriented languages, I encourage you to follow along as things are a little different in JavaScript. I think it will be worthwhile for you to have a look at these concepts in the realm of JavaScript.

In this chapter, we will cover:

• JavaScript objects and their constructors
• What this keyword is and how it behaves in different contexts
• Closure and its uses
• Inheritance in JavaScript
• Prototype chaining

And other related topics.