Book Image

Mastering JavaScript Object-Oriented Programming

Book Image

Mastering JavaScript Object-Oriented Programming

Overview of this book

ECMAScript 6 introduces several new Object-Oriented features that drastically change the way developers structure their projects. Web developers now have some advanced OOP functionality at their disposal to build large-scale applications in JavaScript. With this book, we'll provide you with a comprehensive overview of OOP principles in JavaScript and how they can be implemented to build sophisticated web applications. Kicking off with a subtle refresher on objects, we'll show you how easy it is to define objects with the new ES6 classes. From there, we'll fly you through some essential OOP principles, forming a base for you to get hands-on with encapsulation. You'll get to work with the different methods of inheritance and we'll show you how to avoid using inheritance with Duck Typing. From there, we'll move on to some advanced patterns for object creation and you'll get a strong idea of how to use interesting patterns to present data to users and to bind data. We'll use the famous promises to work with asynchronous processes and will give you some tips on how to organize your code effectively. You'll find out how to create robust code using SOLID principles and finally, we'll show you how to clearly define the goals of your application architecture to get better, smarter, and more effective coding. This book is your one-way ticket to becoming a JavaScript Jedi who can be counted on to deliver flexible and maintainable code.
Table of Contents (18 chapters)
Mastering JavaScript Object-Oriented Programming
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

The builder pattern


Another way to delegate the task of creating objects to another object is using the builder pattern. This pattern is used to create complex objects that usually require a step-by-step approach.

In the classical definition, this pattern involves the following actors:

  • The client: This is the object that needs a new object

  • The director: This is the actor who knows how to create an object, that is, it knows the necessary steps to get an object built

  • The builder: This actor actually builds the object by providing methods used by the director

  • The product: It is the resulting object built by the builder under the control of the director

In a nutshell, the client asks for a product from the director, who creates it by means of the builder. The following diagram shows the interaction between the actors:

Let's map this pattern in our software house context.

Suppose that our SoftwareHouse class has a createSoftware()method that takes a software specification and returns an application...