Advanced Ajax: Architecture and Best Practices by Shawn M. Lauriat

By Shawn M. Lauriat

“I greatly loved how this ebook covers the complete Ajax software lifecycle and never in simple terms coding innovations. an individual who's trying to turn into a qualified front-end developer will take pleasure in the architectural perception and most sensible practices introduced by means of this book.”  — Andi Gutmans, Co-Founder & Co-Chief know-how Officer of Zend applied sciences   Mission-Critical Ajax: Maximizing Scalability, functionality, safety, Reliability, and Maintainability   complex Ajax: structure and most sensible Practices is the definitive consultant to construction business-critical, production-quality net purposes with Ajax. Shawn M. Lauriat systematically addresses the layout, structure, and improvement concerns linked to Ajax, delivering confirmed styles and strong code examples on hand in no different publication. You’ll locate top practices for addressing the total spectrum of matters company Ajax builders face: scalability, functionality, defense, reliability, flexibility, maintainability, and reusability.   Writing for knowledgeable net builders, Lauriat offers clean rules and chic suggestions: meaty technical content material, awarded with unprecedented readability. one of the themes he covers in extraordinary intensity: cleanly enforcing JavaScript customized occasions to lessen coupling and to reinforce flexibility; overcoming Ajax’s conventional accessibility obstacles; decreasing community latency via compression and different recommendations; and lots more and plenty extra. assurance contains  making plans Ajax interfaces for simplicity, readability, and intuitiveness growing scalable, maintainable architectures for client-side JavaScript utilizing the newest instruments to profile, validate, and debug client-side code Architecting the server part for protection and performance, whereas limiting loaded information, gadgets, and activities to present requests keeping opposed to the main common and demanding Ajax defense dangers Optimizing each element of an Ajax software, from server-side scripts to database interactions Introducing state-of-the-art Ajax: video game improvement, Ajax with canvas, and Ajax for company purposes concerning the site This book’s significant other website (http://advancedajax.frozen-o.com) doesn’t simply supply the entire code: It indicates code examples in motion, as development blocks of a true internet program interface.

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This layer of abstraction makes maintenance much easier, by allowing the messages to follow a simple Model-View-Controller (MVC) implementation along with the rest of the application. log', $message . "\n", FILE_APPEND & LOCK_EX ); break; } } } 30 Chapter 1 Usability To conclude, message queues on the server- or client-side need to stay light, flexible, and fast to develop. By decoupling the queue management from queue rendering, these requirements come easily and intuitively. 4 Semantic Markup Although many XHTML coders out there cringe at the thought of “having” to use semantic markup (because it can require a little more CSS to lay out interfaces exactly the way they intended), semantic markup can have many benefits in addition to the accessibility it can bring.

Simply adding a control to slow down (or accelerate, for those who prefer it to update more often) the display of headlines in this example would meet the Section 508 requirement around timed responses. Screen Readers Can Handle Ajax 53 Although Section 508 refers to a United States law, many non-government employment opportunities (United States-based and otherwise) require knowledge of the law, as any company under contract with or receiving funds from the United States’ government must adhere to it.

In some cases, the DOM methods available in one browser may prove faster, or more completely implemented, than others. importNode can make importing external markup extremely fast and simple, but IE does not support it. Many developers have simply written their own replacement for use in IE when a native implementation does not exist. indexOf in the window object instead. In other browsers, adding or even replacing methods of globally available objects (such as Array, XMLHttpRequest, and String) has support by default simply because they provide true JavaScript support.

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