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Beginning JavaScript with DOM Scripting and Ajax From Novice to Professional

:	Christian Heilmann
:	Beginning JavaScript with DOM Scripting and Ajax From Novice to Professional
:	Apress
:	9781430201847
:	1
:	CHF 32.20
:

:	Informatik
:	English

:	512
:	Wasserzeichen/DRM
:	PC/MAC/eReader/Tablet
:	PDF

This is the most up-to-date book on JavaScript available, covering current standards, techniques, and practices. It provides all you need to know to hit the ground running, without making you trawl through hundreds of pages of syntax. The book contains multiple chapters on Ajax and DOM Scripting, which are two of the hottest web development and design tools available today. Using a pragmatic and thorough approach, the book ensures that even the most novice JavaScript programmers will become familiar and comfortable using the tools presented.

Christian Heilmann grew up in Germany and, after a year working with people with disabilities through the Red Cross, he spent a year as a radio producer. Beginning in 1997, he worked for several agencies in Munich as a web developer. In 2000, he moved to the U.S. to work for eToys and, after the dot-com crash, he moved to the U.K., where he currently works as a lead developer for Agilisys. He publishes an almost-daily blog at http://wait-till-i.com and runs an article repository at http://icant.co.uk. He is a member of the Web Standards Project's DOM Scripting Task Force.

	Contents	6
	Foreword	12
	About the Author	13
	About the Technical Reviewer	14
	Acknowledgments	15
	Introduction	16
	Chapter 1 Getting Started with JavaScript	19
	The Why of JavaScript	21
	What Is JavaScript?	22
	Problems and Merits of JavaScript	23
	Why Use JavaScript If It Cannot Be Relied On?	24
	JavaScript in a Web Page and Essential Syntax	25
	JavaScript Syntax	26
	Code Execution	27
	An Aside About Functions	29
	Objects	30
	Simple JavaScript Example	31
	Summary	34
	Chapter 2 Data and Decisions	35
	Data, Data Types, and Data Operators	36
	The String Data Type	36
	Operators	39
	JavaScript Variables	41
	Converting Different Types of Data	44
	The Composite Data Types: Array and Object	48
	Objects JavaScript Supplies You with: String, Date, and Math	48
	Arrays	57
	The Array Object s Methods and Properties	60
	Making Decisions in JavaScript	63
	The Logical and Comparison Operators	63
	Conditional Statements	67
	Testing Multiple Values: the switch Statement	70
	Repeating Things: Loops	72
	Summary	77
	Chapter 3 From DHTML to DOM Scripting	78
	JavaScript As the Behavior Layer	80
	Object Detection vs. Browser Dependence	82
	Progressive Enhancement	85
	JavaScript and Accessibility	86
	Good Coding Practices	88
	Naming Conventions	88
	Code Layout	89
	Commenting	91
	Functions	93
	Short Code via Ternary Operator	96
	Sorting and Reuse of Functions	97
	Variable and Function Scope	97
	Keeping Scripts Safe with the Object Literal	98
	Summary	100
	Chapter 4 HTML and JavaScript	102
	The Anatomy of an HTML Document	102
	Providing Feedback in Web Pages via JavaScript: The Old School Ways	106
	Using window Methods: prompt(), alert(), and confirm()	107
	Accessing the Document via the DOM	113
	Of Children, Parents, Siblings, and Values	116
	From the Parents to the Children	117
	From the Children to the Parents	119
	Among Siblings	120
	Changing Attributes of Elements	124
	Creating, Removing, and Replacing Elements	126
	Avoiding NOSCRIPT	130
	Shortening Your Scripts via InnerHTML	132
	DOM Summary: Your Cheat Sheet	133
	DOMhelp: Our Own Helper Library	135
	Summary	139
	Chapter 5 Presentation and Behavior (CSS and Event Handling)	140
	Changing the Presentation Layer via JavaScript	140
	Helping the CSS Designer	148
	Changing the Document s Behavior via Event Handling	170
	Events in the W3C-Compliant World	173
	Fixing Events for the Non-W3C-Compliant World	182
	Never Stop Optimizing	189
	The Ugly Page Load Problem and Its Ugly Solutions	190
	Reading and Filtering Keyboard Entries	191
	The Dangers of Event Handling	196
	Summary	197
	Chapter 6 Common Uses of JavaScript: Images and Windows	199
	Images and JavaScript	199
	Basics of Image Scripting	200
	Preloading Images	202
	Rollover Effects	203
	Slide Shows	212
	Summary of Images and JavaScript	227
	Windows and JavaScript	228
	Window Properties	229
	Window Methods	231
	Summary: Windows and JavaScript	254
	Summary	255
	Chapter 7 JavaScript and User Interaction: Navigation and Forms	256
	Navigation and JavaScript	256
	The Fear of the Page Reload	257
	Basics of Navigation and JavaScript	257
	Browser Navigation	260
	In-Page Navigation	261
	Site Navigation	270
	Pagination	278
	Summary of Navigation with JavaScript	287
	Forms and JavaScript	287
	Basics of Forms with JavaScript	289
	Form Elements	290
	Interactive Forms: Hiding and Showing Dependent Elements	306
	Custom Form Elements	312
	Summary of Forms and JavaScript	312
	Summary	312
	Chapter 8 Back-End Interaction with Ajax	314
	Household Cleaning Liquid, Football Club, or Flash Gordon s Spacecraft: What Is Ajax?	315
	Et Tu, Cache?	324
	Putting the X Back into Ajax	324
	Replacing XML with JSON	329
	Using Server-Side Scripts to Reach Third-Party Content	331
	XHR on Slow Connections	335
	A Larger Ajax Example: Connected Select Boxes	338
	Optional Dynamic Ajax Menus	346
	Summary	355
	Chapter 9 Data Validation Techniques	357
	Pros and Cons of Client-Side JavaScript Validation	357
	A Quick Reminder About Protecting Content with JavaScript	358
	The One-Size-Fits-All Validation Myth	359
	Basic JavaScript Validation with String and Numeric Methods	360
	String Validation Methods	360
	Numeric Validation Methods	366
	Regular Expressions	371
	Syntax and Attributes	371
	Wildcard Searches, Constraining Scope,