Download e-book for iPad: Ajax: The Complete Reference by Thomas A. Powell

By Thomas A. Powell

ISBN-10: 007149216X

ISBN-13: 9780071492164

The Definitive advisor to Ajax net software Development
Evolve from the click-and-wait programming development to the newest net 2.0 paradigm utilizing this entire advisor to Ajax. Written by way of net improvement professional Thomas Powell, the ebook lays out each characteristic of Ajax along precise reasons and real-world code examples.
Ajax: the entire Reference explains how one can create and try out Ajax-enabled internet purposes utilizing the XMLHttpRequest item in addition to substitute JavaScript-based conversation mechanisms. you will discover numerous pattern purposes that includes rising user-interface conventions and construct purposes that handle real-world networking and safeguard concerns. a strong communique library is built through the e-book that permits you to architect versatile Ajax purposes. the most recent applied sciences resembling net prone, Flash-Ajax integration, client-side templates, Comet, and Offline entry also are lined. realize the way forward for internet improvement today!
- paintings with conventional JavaScript communique techniques like iframes
- discover the entire quirks and info within the XMLHttpRequest object
- deal with disparate info codecs, together with XML, JSON, CSV, YAML, and more
- care for networking matters, together with timeouts, retries, reaction ordering, and numerous server and content material errors
- Simplify JavaScript programming utilizing open-source Ajax libraries like YUI
- safe Ajax functions utilizing authentication, obfuscation, and encryption
- enforce universal Ajax UI styles similar to car recommend, click-to-edit, and drag-and-drop
- remedy troubling Ajax structure difficulties, together with again button, historical past, and bookmarking issues
- study Ajax's position in net 2.0 and internet services
- discover push variety communique utilizing Comet and Flash
- realize the way forward for offline internet software entry and operation

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It is also possible to use DOM-style methods to perform the same task as previously discussed, but such methods add nothing in terms of functionality. php"; /* form query string with rating and example id string */ var payload = "rating=" + escape(rating); payload += "&transport=" + escape(transport); /* submit rating */ sendRequest(url,payload); PART I the image request not only tries to fetch an object, but also sends some information via the query string parameters. To transmit data this way, it is not necessary to resort to direct embedding of the image into the page using XHTML; instead JavaScript can do so dynamically.

Two-way Communications Traditional JavaScript supported numerous ways to accomplish two-way communication; in fact, the same set of approaches from the previous sections can be extended to perform this. Of course, some of these techniques are better than others, particularly the iframes and script approaches, which have a bit more flexibility than others. Images for Two-way Communications It would seem that using an image is likely not the best way to transmit two-way information. Consider that if you ask for an image you are going to be receiving an image, likely in GIF, JPEG, or PNG format for display.

The browser normally provides a number of clues such as a pulsating logo, an hour glass icon, and status bar changes to inform the user that communication is taking place, but when this is performed via JavaScript many of these feedback mechanisms will be silent. It is important to show the user some form of request status, usually with a message or animated GIF that spins, bounces, or whatever else you can think of to mesmerize the user long enough to prevent them from getting annoyed and leaving.

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Ajax: The Complete Reference by Thomas A. Powell

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