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

Using object() method


Based on the idea that objects inherit from objects, Douglas Crockford advocates the use of an object() function that accepts an object and returns a new one that has the parent as a prototype:

    function object(o) { 
    function F() {} 
    F.prototype = o; 
    return new F(); 
    } 

If you need access to an uber property, you can modify the object() function as follows:

    function object(o) { 
    var n; 
    function F() {} 
    F.prototype = o; 
    n = new F(); 
    n.uber = o; 
    return n; 
    } 

Using this function is the same as using extendCopy(), you take an object such as twoDee, create a new object from it, and then proceed to augmenting the new object:

    var triangle = object(twoDee); 
    triangle.name = 'Triangle'; 
    triangle.getArea = function () { 
    return this.side * this.height / 2; 
    }; 

The new triangle still behaves the same way:

    >triangle...