The bestselling JavaScript guide, updated with current features
and best practices
Beginning JavaScript 5th Edition shows you how to
work effectively with JavaScript frameworks, functions, and modern
browsers, and teaches more effective coding practices using HTML5.
This new edition has been extensively updated to reflect the way
JavaScript is most commonly used today, introducing you to the
latest tools and techniques available to JavaScript developers.
Coverage includes modern coding practices using HTML5 markup, the
JSON data format, DOM APIs, the jQuery framework, and more.
Exercises with solutions provide plenty of opportunity to practice,
and the companion website offers downloadable code for all examples
given in the book.
* Learn JavaScript using the most up to date coding style
* Understand JSON, functions, events, and feature detection
* Utilize the new HTML5 elements and the related API
* Explore new features including geolocation, local storage, and
more
JavaScript has shaped the Web from a passive medium into one
that is rich, dynamic, and interactive. No matter the technology on
the server side, it's JavaScript that makes it come alive in the
browser. To learn JavaScript the way it's used today, Beginning
JavaScript, 5th Edition is your concise guide.
Autorentext
About the authors
Jeremy McPeak is a professional programmer and analyst who works extensively with JavaScript and C#. He coauthored both of the previous editions of Beginning JavaScript, and authored the well-reviewed JavaScript 24-Hour Trainer. He contributes to the online, web-centric learning site Tuts+ Code, covering topics such as JavaScript, C#, and the .NET Framework.
Paul Wilton owns his own company, providing online booking systems to vacation property owners, which is largely developed using JavaScript.
Zusammenfassung
The bestselling JavaScript guide, updated with current features and best practices
Beginning JavaScript 5th Edition shows you how to work effectively with JavaScript frameworks, functions, and modern browsers, and teaches more effective coding practices using HTML5. This new edition has been extensively updated to reflect the way JavaScript is most commonly used today, introducing you to the latest tools and techniques available to JavaScript developers. Coverage includes modern coding practices using HTML5 markup, the JSON data format, DOM APIs, the jQuery framework, and more. Exercises with solutions provide plenty of opportunity to practice, and the companion website offers downloadable code for all examples given in the book.
- Learn JavaScript using the most up to date coding style
- Understand JSON, functions, events, and feature detection
- Utilize the new HTML5 elements and the related API
- Explore new features including geolocation, local storage, and more
JavaScript has shaped the Web from a passive medium into one that is rich, dynamic, and interactive. No matter the technology on the server side, it's JavaScript that makes it come alive in the browser. To learn JavaScript the way it's used today, Beginning JavaScript, 5th Edition is your concise guide.
Inhalt
Introduction xix
Chapter 1: Introduction to Javascript and the Web 1
Introduction to JavaScript 1
What is JavaScript? 2
JavaScript and the Web 3
What Can JavaScript Do for Me? 4
Tools Needed to Create JavaScript Web Applications 4
Development Tools 4
Web Browsers 5
Where Do My Scripts Go? 7
Linking to an External JavaScript File 7
Advantages of Using an External File 8
Your First Simple JavaScript Program 9
Writing More JavaScript 10
A Brief Look at Browsers and Compatibility Problems 15
Summary 16
Chapter 2: Data Types and Variables 17
Types of Data in JavaScript 18
Numerical Data 18
Text Data 19
Boolean Data 20
VariablesStoring Data in Memory 20
Creating Variables and Giving Them Values 22
Assigning Variables with the Value of Other Variables 24
Using DataCalculations and Basic String Manipulation 26
Numerical Calculations 26
Increment and Decrement Operators 29
Operator Precedence 30
Basic String Operations 35
Mixing Numbers and Strings 37
Data Type Conversion 38
Dealing with Strings That Won't Convert 41
Arrays 43
A MultiDimensional Array 47
Summary 52
Chapter 3: Decisions and Loops 55
Decision MakingThe if and switch Statements 56
Comparison Operators 56
Precedence 57
Assignment versus Comparison 57
Assigning the Results of Comparisons 58
The if Statement 58
Logical Operators 62
AND 63
OR 64
NOT 64
Multiple Conditions Inside an if Statement 65
else and else if 69
Comparing Strings 70
The switch Statement 71
Executing the Same Code for Different Cases 75
LoopingThe for and while Statements 76
The for Loop 76
The forin Loop 80
The while Loop 80
The dowhile loop 82
The break and continue Statements 83
Summary 84
Chapter 4: Functions and Scope 87
Creating Your Own Functions 88
Scope and Lifetime 92
Global Scope 92
Functional Scope 93
Identifier Lookup 93
Functions as Values 94
Summary 97
Chapter 5: JavascriptAn ObjectBased Language 99
ObjectBased Programming 100
What are Objects? 100
Objects in JavaScript 100
Using JavaScript Objects 101
Creating an Object 102
Using an Object's Properties 103
Calling an Object's Methods 104
Primitives and Objects 104
JavaScript's Native Object Types 105
String Objects 105
The length Property 106
Finding a String Inside Another StringThe indexOf()
and lastIndexOf() Methods 106
Copying Part of a StringThe substr() and substring() Methods 109
Converting CaseThe toLowerCase() and toUpperCase() Methods 110
Selecting a Single Character from a StringThe charAt() and charCodeAt() Methods 111
Converting Character Codes to a StringThe fromCharCode() Method 115
Removing Leading and Trailing WhitespaceThe trim() Method 115
Array Objects 116
Finding Out How Many Elements are in an ArrayThe length Property 116
Adding ElementsThe push() Method 117
Joining ArraysThe concat() Method 117
Copying Part of an ArrayThe slice() Method 118
Converting an Array into a Single StringThe join() Method 119
Putting Your Array in OrderThe sort() Method 119
Putting Your Array into Reverse OrderThe reverse() Method 121
Finding Array ElementsThe indexOf() and lastIndexOf() Methods 122
Iterating through an Array without Loops 12...