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Object-Oriented JavaScript

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Object-Oriented JavaScript

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Object-Oriented JavaScript
Jul, 2008 | 356 pages
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Table of Contents (18 chapters)
Object-Oriented JavaScript
Object-Oriented JavaScript
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
Preface
Preface
Free Chapter
1
Introduction
Introduction
A Bit of History
The Winds of Change
The Present
The Future
Object-Oriented Programming
OOP Summary
Setting up Your Training Environment
Using the Firebug Console
Summary
2
Primitive Data Types, Arrays, Loops, and Conditions
Primitive Data Types, Arrays, Loops, and Conditions
Variables
Operators
Primitive Data Types
Primitive Data Types Recap
Arrays
Conditions and Loops
Comments
Summary
Exercises
3
Functions
Functions
What is a Function?
Pre-defined Functions
Scope of Variables
Functions are Data
Closures
Summary
Exercises
4
Objects
Objects
From Arrays to Objects
Built-in Objects
Summary
Exercises
5
Prototype
Prototype
The prototype Property
Augmenting Built-in Objects
Summary
Exercises
6
Inheritance
Inheritance
Prototype Chaining
Inheriting the Prototype Only
Uber—Access to the Parent from a Child Object
Isolating the Inheritance Part into a Function
Copying Properties
Heads-up When Copying by Reference
Objects Inherit from Objects
Deep Copy
object()
Using a Mix of Prototypal Inheritance and Copying Properties
Multiple Inheritance
Parasitic Inheritance
Borrowing a Constructor
Summary
Case Study: Drawing Shapes
Exercises
7
The Browser Environment
The Browser Environment
Including JavaScript in an HTML Page
BOM and DOM—An Overview
BOM
DOM
Events
XMLHttpRequest
Summary
Exercises
8
Coding and Design Patterns
Coding and Design Patterns
Coding Patterns
Design Patterns
Summary
Reserved Words
Reserved Words
Keywords
Future Reserved Words
Built-in Functions
Built-in Functions
Built-in Objects
Built-in Objects
Object
Array
Function
Boolean
Number
String
Date
Math
RegExp
Error Objects
Regular Expressions
Regular Expressions
Index
Index

Coding Patterns

This first part of the chapter discusses some patterns that reflect JavaScript's unique features. Some patterns aim to help you with organizing your code (such as namespace patterns), others are related to improving performance (such as lazy definitions and init-time branching), and some make up for missing features such as privately scoped properties. The patterns discussed in this section include:

  • Separating behavior

  • Namespaces

  • Init-time branching

  • Lazy definition

  • Configuration objects

  • Private variables and methods

  • Privileged methods

  • Private functions as public methods

  • Self-executable functions

  • Chaining

  • JSON

Separating Behavior

As discussed previously, the three building blocks of a web page are:

  • Content (HTML)

  • Presentation (CSS)

  • Behavior (JavaScript)

Content

HTML is the content of the web page; the actual text. The content should be marked up using the smallest amount of HTML tags that sufficiently describe the semantic meaning of that content. For example, if you're working on a navigation...

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