Download Ajax: The Complete Reference by Thomas A. Powell PDF

By Thomas A. Powell

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 through net improvement specialist Thomas Powell, the publication lays out each characteristic of Ajax along unique causes and real-world code examples.
Ajax: the total Reference explains the way to create and try out Ajax-enabled net functions utilizing the XMLHttpRequest item in addition to replacement JavaScript-based verbal exchange mechanisms. you will discover various pattern purposes that includes rising user-interface conventions and construct functions that handle real-world networking and protection matters. a powerful verbal exchange library is built in the course of the booklet that permits you to architect versatile Ajax functions. the most recent applied sciences equivalent to net providers, Flash-Ajax integration, client-side templates, Comet, and Offline entry also are coated. notice the way forward for internet improvement today!
- paintings with conventional JavaScript conversation 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 concerns, together with timeouts, retries, reaction ordering, and quite a few 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 comparable to automobile recommend, click-to-edit, and drag-and-drop
- remedy troubling Ajax structure difficulties, together with again button, heritage, and bookmarking issues
- study Ajax's function in net 2.0 and internet services
- discover push kind communique utilizing Comet and Flash
- notice the way forward for offline internet program entry and operation

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Extra resources for Ajax: The Complete Reference

Sample text

The most common techniques used in the pre-Ajax world were image requests, inline frames, and the script tag. With the rise of the XMLHttpRequest (XHR) object use in Ajax, some readers might deduce that the old methods should be retired or that the communication patterns are different, yet such is not the case. Interestingly, some very well-known Ajax-powered sites use these older techniques to get around security limitations of the XHR object or provide backward compatibility. Read on not only to get a solid foundation in JavaScript-based communication but also to learn useful techniques that will resurface later.

However, whatever it was called, for some reason this approach to Web development did not really excite most Web professionals. Why this technology was ignored for years suddenly to be rediscovered is cause for great speculation and debate. Very likely, conservative industry conditions stemming from the dotcom meltdown around the turn of the century slowed adoption, but what changed this is less clear. It is the author’s opinion that Google’s Gmail, Yahoo’s purchase of Ajax pioneer Oddpost, and Microsoft’s Outlook Web Access for Exchange 2000 demonstrated to the world that a JavaScript-based Web application using partial page updates really could work for a large scale, public facing, mission critical application, in these particular cases, Web based e-mail.

SetAttribute("src",url); It isn’t necessary to preload the iframe into the page, the DOM can be used to insert it dynamically. html), notice that your browser will likely show an indication of network activity, which may not be desirable. NOTE Depending on the browser and how you have coded your iframe-based communication, it is possible that the iframe activity will be saved in your browser’s history. In Chapter 9 this “quirk” may turn out to be a good thing that helps fix problems with Ajax and the back button, but in a one-way communication pattern it may not be desirable.

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