Object-Oriented JavaScript - Second Edition

Stoyan Stefanov, Kumar Chetan Sharma

• Éditeur: Packt Publishing
• Année: 2013
• ISBN:
  9781849693134
• Édition: 1
• Sujet: Computer Science
• Sous-sujet: Object Oriented Programming

You will first be introduced to object-oriented programming, then to the basics of objects in JavaScript. 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 you review what you have learned.For new to intermediate JavaScript developer who wants to prepare themselves for web development problems solved by smart JavaScript!

Object-Oriented JavaScript Second Edition

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Table of Contents

Object-Oriented JavaScript Second Edition

Credits

About the Authors

About the Reviewer

www.PacktPub.com

Support files, eBooks, discount offers and more

Why Subscribe?

Free Access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Errata

Piracy

Questions

1. Object-oriented JavaScript

A bit of history

Browser wars and renaissance

The present

The future

ECMAScript 5

Object-oriented programming

Objects

Classes

Encapsulation

Aggregation

Inheritance

Polymorphism

OOP summary

Setting up your training environment

WebKit's Web Inspector

JavaScriptCore on a Mac

More consoles

Summary

2. Primitive Data Types, Arrays, Loops, and Conditions

Variables

Variables are case sensitive

Operators

Primitive data types

Finding out the value type – the typeof operator

Numbers

Octal and hexadecimal numbers

Exponent literals

Infinity

NaN

Strings

String conversions

Special strings

Booleans

Logical operators

Operator precedence

Lazy evaluation

Comparison

Undefined and null

Primitive data types recap

Arrays

Adding/updating array elements

Deleting elements

Arrays of arrays

Conditions and loops

The if condition

The else clause

Code blocks

Checking if a variable exists

Alternative if syntax

Switch

Loops

While loops

Do-while loops

For loops

For-in loops

Comments

Summary

Exercises

3. Functions

What is a function?

Calling a function

Parameters

Predefined functions

parseInt()

parseFloat()

isNaN()

isFinite()

Encode/decode URIs

eval()

A bonus – the alert() function

Scope of variables

Variable hoisting

Functions are data

Anonymous functions

Callback functions

Callback examples

Immediate functions

Inner (private) functions

Functions that return functions

Function, rewrite thyself!

Closures

Scope chain

Breaking the chain with a closure

Closure #1

Closure #2

A definition and closure #3

Closures in a loop

Getter/setter

Iterator

Summary

Exercises

4. Objects

From arrays to objects

Elements, properties, methods, and members

Hashes and associative arrays

Accessing an object's properties

Calling an object's methods

Altering properties/methods

Using the this value

Constructor functions

The global object

The constructor property

The instanceof operator

Functions that return objects

Passing objects

Comparing objects

Objects in the WebKit console

console.log

Built-in objects

Object

Array

A few array methods

Function

Properties of function objects

Prototype

Methods of function objects

Call and apply

The arguments object revisited

Inferring object types

Boolean

Number

String

A few methods of string objects

Math

Date

Methods to work with date objects

Calculating birthdays

RegExp

Properties of RegExp objects

Methods of RegExp objects

String methods that accept regular expressions as arguments

search() and match()

replace()

Replace callbacks

split()

Passing a string when a RegExp is expected

Error objects

Summary

Exercises

5. Prototype

The prototype property

Adding methods and properties using the prototype

Using the prototype's methods and properties

Own properties versus prototype properties

Overwriting a prototype's property with an own property

Enumerating properties

isPrototypeOf()

The secret __proto__ link

Augmenting built-in objects

Augmenting built-in objects – discussion

Prototype gotchas

Summary

Exercises

6. Inheritance

Prototype chaining

Prototype chaining example

Moving shared properties to the prototype

Inheriting the prototype only

A temporary constructor – new F()

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

Mixins

Parasitic inheritance

Borrowing a constructor

Borrow a constructor and copy its prototype

Summary

Case study – drawing shapes

Analysis

Implementation

Testing

Exercises

7. The Browser Environment

Including JavaScript in an HTML page

BOM and DOM – an overview

BOM

The window object revisited

window.navigator

Your console is a cheat sheet

window.location

window.history

win...