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Object-Oriented JavaScript

You're reading from   Object-Oriented JavaScript Learn everything you need to know about object-oriented JavaScript (OOJS)

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Product type Paperback
Published in Jan 2017
Publisher Packt
ISBN-13 9781785880568
Length 550 pages
Edition 3rd Edition
Languages
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Authors (2):
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Ved Antani Ved Antani
Author Profile Icon Ved Antani
Ved Antani
Stoyan STEFANOV Stoyan STEFANOV
Author Profile Icon Stoyan STEFANOV
Stoyan STEFANOV
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Toc

Table of Contents (25) Chapters Close

Object-Oriented JavaScript - Third Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
1. Object-Oriented JavaScript FREE CHAPTER 2. Primitive Data Types, Arrays, Loops, and Conditions 3. Functions 4. Objects 5. ES6 Iterators and Generators 6. Prototype 7. Inheritance 8. Classes and Modules 9. Promises and Proxies 10. The Browser Environment 11. Coding and Design Patterns 12. Testing and Debugging 13. Reactive Programming and React Reserved Words Built-in Functions
Built-in Objects Regular Expressions
Answers to Exercise Questions

BOM


The BOM is a collection of objects that give you access to the browser and the computer screen. These objects are accessible through the global object window.

The window object revisited

As you already know, in JavaScript, there's a global object provided by the host environment. In the browser environment, this global object is accessible using window. All global variables are also accessible as properties of the window object. For example, take a look at the following code:

    > window.somevar = 1; 
           1 
    > somevar; 
           1 

Additionally, all the core JavaScript functions, discussed in Chapter 2, Primitive Data Types, Arrays, Loops, and Conditions, are methods of the global object. Consider the following piece of code:

    > parseInt('123a456'); 
           123 
    > window.parseInt('123a456'); 
           123 

In addition to being a reference to the global object, the window object also serves a second purpose-providing...

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