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

By Shawn M. Lauriat

“I greatly loved how this publication covers the whole Ajax program lifecycle and never in simple terms coding strategies. an individual who's trying to develop into a qualified front-end developer will savor the architectural perception and top practices brought via this book.”  — Andi Gutmans, Co-Founder & Co-Chief expertise Officer of Zend applied sciences   Mission-Critical Ajax: Maximizing Scalability, functionality, protection, Reliability, and Maintainability   complicated Ajax: structure and most sensible Practices is the definitive consultant to development business-critical, production-quality net functions with Ajax. Shawn M. Lauriat systematically addresses the layout, structure, and improvement concerns linked to Ajax, delivering confirmed styles and powerful code examples on hand in no different publication. You’ll locate top practices for addressing the whole spectrum of matters company Ajax builders face: scalability, functionality, protection, reliability, flexibility, maintainability, and reusability.   Writing for knowledgeable net builders, Lauriat provides clean rules and chic recommendations: meaty technical content material, awarded with remarkable readability. one of many themes he covers in remarkable intensity: cleanly enforcing JavaScript customized occasions to minimize coupling and to reinforce flexibility; overcoming Ajax’s conventional accessibility boundaries; decreasing community latency via compression and different innovations; and lots more and plenty extra. assurance comprises  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 facet for defense and performance, whereas proscribing loaded information, items, and activities to present requests holding opposed to the main common and critical Ajax safeguard hazards Optimizing each component to an Ajax program, from server-side scripts to database interactions Introducing state-of-the-art Ajax: video game improvement, Ajax with canvas, and Ajax for company functions concerning the site This book’s significant other website (http://advancedajax.frozen-o.com) doesn’t simply offer all of the code: It exhibits code examples in motion, as construction blocks of a true net software interface.

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Each function sets the title attribute and sets an onblur event to remove the title attribute (because once the users listen to the updated content and move on, the interface should not instruct the users to enable the virtual buffer should they want to revisit the element in question); the script also sets a tabindex of -1 to ensure that the focus() call will work and then inserts the new content into the DOM and draws focus to it: /** * Abstract out the replacement of text to add screen reader support.

As described in a number of the checklist items, in order to meet WCAG level 2 standards, a web application must use semantic markup. Any headings must properly use the h1 through h6 tags, lists must use the markup available for describing and organizing lists (dl, ol, and ul), and quotations must use the markup available rather than a given string simply having quotation marks surround it. 48 Chapter 2 Accessibility This requirement poses a difficult problem for those writing markup, as IE does not actually support the q tag for an inline quote.

Thus, the caption tag gives context to the table headings about to get read out to the user. By adding a summary attribute to the table when appropriate, users with screen readers will have an even better idea of what the table has organized before they get lost in the sea of table cells. IE does not render a table until all the table’s contents loads into the browser. This means that when a table contains thousands of rows of data, IE users will simply get a blank screen until the entire contents load, at which point the data will appear on the screen all at once.

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