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Object-Oriented JavaScript

By : Stoyan STEFANOV

4.5 (48)

Object-Oriented JavaScript

4.5 (48)

By: Stoyan STEFANOV

Overview of this book

The book requires no prior knowledge of JavaScript and works from the ground up to give you a thorough grounding in this powerful language. If you do already know some JavaScript, you will find plenty of eye-openers as you discover just what the language can do. This book takes a do-it-yourself approach when it comes to writing code, because the best way to really learn a programming language is by writing code. You are encouraged to type code into Firebug's console, see how it works and then tweak it and play around with it. There are practice questions at the end of each chapter to help review what you have learned.

Object-Oriented JavaScript

Object-Oriented JavaScript

Credits

Credits

About the Author

About the Author

About the Reviewers

About the Reviewers

Preface

Preface

Free Chapter

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

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

Functions

Functions

What is a Function?

Pre-defined Functions

Scope of Variables

Functions are Data

Closures

Summary

Exercises

Objects

Objects

From Arrays to Objects

Built-in Objects

Summary

Exercises

Prototype

Prototype

The prototype Property

Augmenting Built-in Objects

Summary

Exercises

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

The Browser Environment

The Browser Environment

Including JavaScript in an HTML Page

BOM and DOM—An Overview

BOM

DOM

Events

XMLHttpRequest

Summary

Exercises

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

XMLHttpRequest

XMLHttpRequest() is an object (a constructor function) that allows you to send HTTP requests from JavaScript. Historically, XMLHttpRequest (or XHR for short) was introduced in IE and was initially implemented as an ActiveX object. Starting with IE7 it is a a native browser object, the same way as it is in Firefox, Safari, and Opera. The common implementation of this object across browsers gave birth to the so-called AJAX applications, where it is no longer necessary to refresh the whole page every time you need new content. With JavaScript, you can make an HTTP request to the server, get the response and update only a part of the page. In this way you can build much more responsive, desktop-like web pages.

AJAX stands for Asynchronous JavaScript and XML.

Asynchronous because after sending an HTTP request your code doesn't need to wait for the response, but it can do other stuff and be notified (through an event) when the response arrives.
JavaScript—well, it's pretty obvious...

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Programming languages

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