You are previewing Programming the Mobile Web.

Programming the Mobile Web

Cover of Programming the Mobile Web by Maximiliano Firtman Published by O'Reilly Media, Inc.
  1. Programming the Mobile Web
    1. SPECIAL OFFER: Upgrade this ebook with O’Reilly
    2. Preface
      1. Who This Book Is For
      2. Who This Book Is Not For
      3. What You’ll Learn
      4. Other Options
      5. If You Like (or Don’t Like) This Book
      6. Conventions Used in This Book
      7. Using Code Examples
      8. How to Contact Us
      9. Safari® Books Online
      10. Acknowledgments
    3. 1. The Mobile Jungle
      1. Myths of the Mobile Web
      2. The Mobile Ecosystem
      3. Mobile Knowledge
      4. Brands, Models, and Platforms
      5. Technical Information
      6. Market Statistics
    4. 2. Mobile Browsing
      1. The Mobile Browsing Experience
      2. Mobile Web Eras
    5. 3. Architecture and Design
      1. Website Architecture
      2. Design and Usability
    6. 4. Setting Up Your Environment
      1. Setting Up a Development Environment
      2. Production Environment
    7. 5. Markups and Standards
      1. First, the Old Ones
      2. Current Standards
      3. XHTML Mobile Profile and Basic
      4. CSS for Mobile
      5. Confusion
    8. 6. Coding Markup
      1. Heading Structure
      2. The Document Body
      3. Plug-ins and Extensions
    9. 7. CSS for Mobile Browsers
      1. Where to Insert the CSS
      2. Selectors
      3. CSS Techniques
      4. Common Patterns
      5. CSS Sprites
      6. WebKit Extensions
    10. 8. JavaScript Mobile
      1. Supported Technologies
      2. Coding JavaScript for Mobile Browsers
    11. 9. Ajax, RIA, and HTML 5
      1. Ajax Support
      2. JavaScript Libraries
      3. WebKit CSS Extensions
      4. Mobile Rich Internet Applications
      5. HTML 5
    12. 10. Server-Side Browser Detection and Content Delivery
      1. Mobile Detection
      2. Content Delivery
      3. Multimedia and Streaming
      4. Content Adaptation
      5. Mobilizing WordPress and Other CMSs
    13. 11. Geolocation and Maps
      1. Location Techniques
      2. Detecting the Location
      3. Showing a Map
    14. 12. Widgets and Offline Webapps
      1. Mobile Widget Platforms
      2. Standards
      3. Platforms
      4. Widget Design Patterns
    15. 13. Testing, Debugging, and Performance
      1. Testing and Debugging
      2. Performance Optimization
    16. 14. Distribution and Social Web 2.0
      1. Mobile SEO
      2. Mobile Web Statistics
      3. Mobile Web Advertising
      4. Mobile Web Social Features
    17. A. MIME Types for Mobile Content
      1. Markup and Script MIME Types
      2. Image MIME Types
      3. Mobile Content MIME Types
      4. Audio and Video MIME Types
      5. Widget and Webapp MIME Types
    18. Index
    19. About the Author
    20. Colophon
    21. SPECIAL OFFER: Upgrade this ebook with O’Reilly

Chapter 8. JavaScript Mobile

Designing for the Web is about more than content and presentation—users expect websites to be interactive, responding to their choices. Fortunately, although it has some limitations, the JavaScript you use in developing for the mobile web is similar to that used in desktop web development.

We have already talked a bit about the WAP 1.1 standard scripting language, WMLScript. We won’t go any deeper into this obsolete language, but it will not be difficult to learn if you need to do a little scripting with it. The WAP 2.0 standard that brought us XHTML MP and WAP CSS didn’t define any scripting support. This was bad for the first few years, because we could create scripts in WAP 1.0 documents but not in WAP 2.0 ones.

Thankfully, a couple of years after this standard was released, mobile browsers started to add some support for JavaScript (or ECMAScript, to be totally correct). The standards for mobile scripting are more difficult to define than the standards for CSS. The great benefit is that, excepting some bugs, JavaScript can check at runtime whether some feature, object, or API is available, so we can code for different “standards.”


The standard name for JavaScript is ECMAScript, because it is defined by the ECMA (an international, private nonprofit standards organization). There are three well-known dialects on the market: JavaScript (trademark of Sun, licensed now to the Mozilla Foundation), ActionScript (trademark of Adobe), and JScript (trademark ...

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