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


Let's summarize the most important topics you have learned in this chapter:

  • All functions have a property called prototype. Initially, it contains an empty object-an object without any own properties.

  • You can add properties and methods to the prototype object. You can even replace it completely with an object of your choice.

  • When you create an object using a function as a constructor (with new), the object gets a secret link pointing to the prototype of the constructor and can access the prototype's properties.

  • An object's own properties take precedence over a prototype's properties with the same name.

  • Use the hasOwnProperty() method to differentiate between an object's own properties and prototype properties.

  • There is a prototype chain. When you execute, and if your foo object doesn't have a property called bar, the JavaScript interpreter looks for a bar property in the prototype. If none is found, it keeps searching in the prototype's prototype, then the prototype of the prototype...