Beginning JavaScript with DOM Scripting and Ajax, 2nd Edition

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■ Contents A Larger Ajax Example: Connected Select Boxes 266 Nodejs 272 Installing Nodejs and Getting Started 273 Modules 273 Callbacks 274 Debugging 275 Summary 277 ■ Chapter 9: Data Validation Techniques279 Pros and Cons of Client-Side Validation 279 A Quick Reminder About Protecting Content with JavaScript 280 Regular Expressions 280 Syntax and Attributes 281 Wildcard Searches, Constraining Scope, and Alternatives 282 Restricting the Number of Characters with Quantifiers 282 Word Boundaries, Whitespace, and Other Shortcuts 283 Methods Using Regular Expressions 284 The Power of Parentheses Grouping 285 Regular Expression Resources 285 Summary of Validation Methods 286 Constraint Validation 286 Designating Mandatory Fields 286 Additional Validation Attributes 287 The Novalidate Attribute 288 Additional User Feedback Using CSS Pseudo Classes 288 Detecting Support for HTML5 Form Attributes 290 Constraint Validation API 290 Showing a List of Erroneous Fields 291 Other Dynamic Validation Methods 292 Browsers That Don’t Support Constraint Validation 294 Summary 295 www.it-ebooks.info xi
■ Contents ■■Chapter 10: Modern JavaScript Case Study: A Dynamic Gallery297 Basics of Thumbnail Galleries297 What Is a Thumbnail Gallery and What Should It Do?297 Static Thumbnail Galleries298 Faking Dynamic Galleries with JavaScript298 Displaying Captions304 Dynamic Thumbnail Galleries308 Creating an Image Badge from a Folder312 Summary319 ■■Chapter 11: Using Third-Party JavaScript321 What the Web Offers You321 REST APIs and Libraries321 Using a Library: Short, Shorter, jQuery322 Dangers of jQuery and Other Libraries Using Their Own Syntax 329 Using an API: Adding a Map to Your Site with Google Maps329 Full Service: Introducing Twitter Bootstrap335 Adding Bootstrap to Your Site 335 Summary342 ■■Appendix A: Debugging JavaScript343 Common JavaScript Mistakes343 Misspellings and Case-Sensitivity Issues 343 Trying to Access Undefined Variables 344 Incorrect Number of Closing Braces and Parentheses 346 Concatenation Gone Wrong 349 Assigning Instead of Testing the Value of a Variable 350 Tracing Errors with alert( ) and “Console” Elements350 Error Handling with try and catch( )351 Sequential Uncommenting352 xii www.it-ebooks.info
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Contents at a Glance About the Auth
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Chapter 1 Getting Started with Java
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Chapter 1 ■ Getting Started with
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Chapter 2 Data and Decisions Data a
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The Date Object Chapter 2 ■ Data
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Generating a Random Number Chapter
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Chapter 3 From DHTML to DOM Scripti
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Chapter 3 ■ From DHTML to DOM Scr
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Variable and Function Scope Chapter
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Chapter 4 HTML and JavaScript In th
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Changing Attributes of Elements Cha
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Shortening Your Scripts via InnerHT
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DOMhelp: Your Own Helper Library Ch
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Chapter 5 Presentation and Behavior
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Chapter 6 Common Uses of JavaScript
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Chapter 6 ■ Common Uses of JavaSc
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Rollover Effects on Parent Elements
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Embedded Slide Shows Chapter 6 ■
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User Feedback Methods The user feed
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Chapter 8 Back-End Interaction with
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Chapter 8 ■ Back-End Interaction
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Replacing XML with JSON Chapter 8
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Summary Chapter 8 ■ Back-End Inte
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Chapter 9 ■ Data Validation Techn
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Chapter 10 Modern JavaScript Case S
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Chapter 10 ■ Modern JavaScript Ca
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