Book Image

Object-Oriented JavaScript

By : Stoyan Stefanov, Stoyan STEFANOV
Book Image

Object-Oriented JavaScript

By: Stoyan Stefanov, Stoyan STEFANOV

Overview of this book

Table of Contents (18 chapters)
Object-Oriented JavaScript
About the Author
About the Reviewers
Built-in Functions
Regular Expressions

Design Patterns

The second part of this chapter presents a JavaScript approach to a subset of the design patterns introduced by the book called Design Patterns: Elements of Reusable Object-Oriented Software, an influential book most commonly referred to as the Book of Four or the Gang of Four, or GoF (after its four authors). The patterns discussed in the GoF book are divided into three groups:

  • Creational patterns that deal with how objects are created (instantiated)

  • Structural patterns that describe how different objects can be composed in order to provide new functionality

  • Behavioral patterns that describe ways for objects to communicate with each other

There are 23 patterns in the Book of Four, and more patterns have been identified since the book's publication. It is way beyond the scope of this book to discuss all of them, so the remainder of the chapter will demonstrate only four of them, along with examples of the implementation of these four in JavaScript. Remember that the patterns...