This three-day course provides comprehensive tuition in implementing AJAX-based functionality in web application development, and goes beyond technology essentials, to take in user interface, cross-browser and concurrency issues, as well as progressive applications of the approach, and the implications these carry.

Essential and Advanced JavaScript

• Classes, methods and polymorphism
• Built-in classes, objects and methods
• Exception handling and exception classes
• X(HT)ML Document Object Models

XMLHTTPRequest Basics

• XHR object instantiation
• Cross-browser coding
• Sending and receiving data
• (A)Synchronous considerations

Encoding Data

• Plain text
• X(HT)ML and SOAP
• JSON (JavaScript Object Notation)
• Using binary formats

XMLHTTPRequest Alternatives

• Dynamic style-sheet loading
• On-demand JavaScript

Hyper-Text Transport Protocol

• HTTP headers and methods
• Server responses
• URL and last-modified detection

Application Design and Implementation

• Concurrency and thread safety
• Guarding against race conditions
• Caching considerations
• Managing latency, timeouts and exceptions

Advanced Techniques

• Transparent and 'eager' script loading
• Emulating frames
• Interactive forms
• Logging client-side run-time errors
• Gathering browsing-pattern statistics
• Combining heterogenous feeds

Advanced knowledge and experience of JavaScript and HTML is not essential, although some basic understanding of these languages is assumed.

This course is appropriate to all client and server-side developers alike.

This course gives a thorough grounding in implementing AJAX-based functionality, and goes beyond technology essentials, to take in user-interface design, cross-browser considerations, and concurrency issues. As well as the use of XMLHTTPRequest, it covers "on-demand" JavaScript, dynamic style-sheet loading, and the gamut of encoding formats such as XML and JSON.

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