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

By Shawn M. Lauriat

“I greatly loved how this publication covers the total Ajax program lifecycle and never in basic terms coding thoughts. a person who's trying to turn into a qualified front-end developer will take pleasure in the architectural perception and most sensible practices introduced through this book.”  — Andi Gutmans, Co-Founder & Co-Chief know-how Officer of Zend Technologies

 

Mission-Critical Ajax: Maximizing Scalability, functionality, safety, Reliability, and Maintainability

 

Advanced Ajax: structure and top Practices is the definitive advisor to construction business-critical, production-quality net purposes with Ajax. Shawn M. Lauriat systematically addresses the layout, structure, and improvement concerns linked to Ajax, supplying confirmed styles and strong code examples on hand in no different ebook. You’ll locate top practices for addressing the entire spectrum of matters company Ajax builders face: scalability, functionality, protection, reliability, flexibility, maintainability, and reusability.

 

Writing for knowledgeable net builders, Lauriat can provide clean principles and stylish strategies: meaty technical content material, provided with remarkable readability. one of the subject matters he covers in exceptional intensity: cleanly enforcing JavaScript customized occasions to lessen coupling and to augment flexibility; overcoming Ajax’s conventional accessibility obstacles; decreasing community latency via compression and different concepts; and lots more and plenty extra. assurance includes 

  • Planning Ajax interfaces for simplicity, readability, and intuitiveness
  • Creating scalable, maintainable architectures for client-side JavaScript
  • Using the newest instruments to profile, validate, and debug client-side code
  • Architecting the server aspect for safeguard and performance, whereas proscribing loaded information, gadgets, and activities to present requests
  • Protecting opposed to the main frequent and critical Ajax defense dangers
  • Optimizing each portion of an Ajax software, from server-side scripts to database interactions
  • Introducing state of the art Ajax: online game improvement, Ajax with canvas, and Ajax for company applications

About the net Site

This book’s spouse site (http://advancedajax.frozen-o.com) doesn’t simply offer all of the code: It exhibits code examples in action, as development blocks of a true internet program interface.

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Example text

Statechange XMLHttpRequest Indicators and Other Forms of User Feedback 17 The more that interface designers know about the user base of an application, the better the impact on the users. This statement may sound obvious, but designs often ignore the current or potential user base. Communication channels between the users, designers, and developers can do wonders for keeping up with and building on user expectations. If the expectations of users do not seem clear, ask them directly for feedback and suggestions.

The example on server-side validation in the last section touched on user expectations when working with the user registration form. Users don’t expect communication with the server in any form unless one of the following is true: • The user initiates the action—This comes in the form of clicking a mouse button, hitting the Enter or Return key, ending a drag-and-drop action, or performing some other definitive event to indicate an expected response from the server. • The action taken does not take the user out of context and happens in seamless integration with the current interface—Auto-saving drafts falls into this category, along with streaming requests such as an RSS ticker.

Coding CSS and JavaScript unobtrusively not only makes it easier for the interface to degrade gracefully, but also it encourages clearer lines between interface structure, design, and behavior. Besides keeping the markup clean of inline styles and scripts (including inline event listeners such as onclick or onsubmit), it rewards good coding practices by making maintenance easier and faster. Additionally, redesigning an application can happen entirely in the stylesheets, as long as the JavaScript references only class names and element IDs.

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