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
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Built-in Functions
Regular Expressions

Destructuring


You will be working with objects and arrays all the time when you code. JavaScript object and array notations resemble the JSON format. You will define objects and arrays, and then retrieve elements from them. ES6 gives a convenient syntax that significantly improves the way we access properties/members from objects and arrays. Let's consider a typical code you would often write:

    var config = { 
      server: 'localhost', 
      port: '8080' 
    } 
    var server = config.server; 
    var port = config.port; 

Here, we extracted values of server and port from the config object and assigned them to local variables. Pretty straightforward! However, when this object has a bunch of properties, some of them nested, this simple operation can get very tedious to write.

ES6 destructuring syntax allows an object literal on the left-hand side of an assignment statement. In the following example, we will define an object config with a few properties. Later...