Book Image

Object-Oriented JavaScript - Third Edition

By : Ved Antani, Stoyan STEFANOV
5 (1)
Book Image

Object-Oriented JavaScript - Third Edition

5 (1)
By: Ved Antani, Stoyan STEFANOV

Overview of this book

JavaScript is an object-oriented programming language that is used for website development. Web pages developed today currently follow a paradigm that has three clearly distinguishable parts: content (HTML), presentation (CSS), and behavior (JavaScript). JavaScript is one important pillar in this paradigm, and is responsible for the running of the web pages. This book will take your JavaScript skills to a new level of sophistication and get you prepared for your journey through professional web development. Updated for ES6, this book covers everything you will need to unleash the power of object-oriented programming in JavaScript while building professional web applications. The book begins with the basics of object-oriented programming in JavaScript and then gradually progresses to cover functions, objects, and prototypes, and how these concepts can be used to make your programs cleaner, more maintainable, faster, and compatible with other programs/libraries. By the end of the book, you will have learned how to incorporate object-oriented programming in your web development workflow to build professional JavaScript applications.
Table of Contents (25 chapters)
Object-Oriented JavaScript - Third Edition
About the Authors
About the Reviewer
Customer Feedback
Built-in Functions
Regular Expressions


In this chapter, you learned quite a few ways (patterns) of implementing inheritance, and the following table summarizes them. The different types can roughly be divided into the following:

  • Patterns that work with constructors

  • Patterns that work with objects

You can also classify the patterns based on whether they:

  • Use the prototype

  • Copy properties

  • Do both (copy properties of the prototype):







Prototype chaining


Child.prototype = new Parent();   

  • Works with constructors

  • Uses the prototype chain

  • The default mechanism

  • Tip - move all properties/methods that are meant to be reused to the prototype, and add the non-reusable as own properties


Inherit only the prototype

Child.prototype = Parent.prototype;   

  • Works with constructors

  • Copies the prototype (no prototype chain, as all share the same prototype object)

  • More efficient; no new instances are created just for the sake of inheritance

  • Prototype...