Introduction to Objects

This chapter provides introductions and tutorial examples on the 'object' data type in JavaScript. Topics include creating 'Object' objects, adding and retrieving properties, adding and running methods, named and indexed properties, comparing arrays with objects.

What Is an Object?

Objects of "Object" Data Type

Adding and Deleting Object Own Properties

Adding and Deleting Object Own Methods

Using "this" Keyword to Represent Current Object

Object Literals of the "Object" Type

Objects and Associate Arrays

Objects with Indexed Properties

Differences between "Object" and "Array"

Using "Array" Objects as "Object" Objects

Table of Contents

 About This Book

 Introduction to JavaScript

 ECMAScript Language Specification and JavaScript Dialects

 Data Types, Variables and Expressions

 Flow Control Statements

 Creating, Accessing, and Manipulating Arrays

 Defining and Calling Functions

 Web Browser Supporting JavaScript

 Server-Side and Client-Side Web Scripting

Introduction to Objects

 Defining Your Own Object Types

 Inheritance of Properties and Methods through the Prototype Object Chain

 'jrunscript' - JavaScript Shell Command from JDK

 Using Functions as "Function" Objects

 Introduction to Built-in Object Types

 W3C's Document Object Model (DOM) Specifications

 References

 PDF Printing Version