Ajax Design Patterns by Mahemoff, Michael

By Mahemoff, Michael

Ajax, or Asynchronous JavaScript and XML, exploded onto the scene within the spring of 2005 and is still the most well liked tale between internet builders. With its wealthy mix of applied sciences, Ajax presents astrong beginning for growing interactive internet functions with XML or JSON-based internet providers by utilizing JavaScript within the browser to strategy the internet server response.

Ajax layout Patterns exhibits you top practices that may dramatically increase your internet improvement tasks. It investigates how others have effectively handled conflictingdesign ideas long ago after which relays that details on to you.

The styles defined within the ebook fall into 4 categories:

  • Foundational know-how: Examines the uncooked applied sciences required for Ajax development
  • Programming: Exposes innovations that builders have came across to make sure their Ajax purposes are maintainable
  • Functionality and value: Describes the kinds of person interfaces you are going to encounter in Ajax functions, in addition to the hot forms of performance that Ajax makes possible
  • Development: Explains the method getting used to observe, debug, and attempt Ajax applications

Ajax layout Patterns also will get you on top of things with center Ajax applied sciences, resembling XMLHttpRequest, the DOM, and JSON. Technical discussions are by way of code examples so that you can see for your self simply what is-and isn't-possible with Ajax. this convenient reference may help you to supply fine quality Ajax architectures, streamline internet program functionality, and increase the userexperience.

Michael Mahemoff holds a PhD in desktop technological know-how and software program Engineering from the college of Melbourne, the place his thesis used to be ''Design Reuse in software program Engineering and Human-Computer Interaction.'' He lives in London and consults on software program improvement concerns in banking, well-being care, and logistics.

''Michael Mahemoff's Ajax layout Patterns is a very complete compendium of webapplication layout services, based round yet no longer restricted to Ajax concepts. Polished nuggets of layout knowledge are supported through tutorials and real-world code examples leading to a ebook thatserves not just as an intermediate to professional guide but additionally as an in depth reference for construction wealthy interactive net applications.''
--Brent Ashley, distant scripting pioneer

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Extra info for Ajax Design Patterns

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It will happen frequently enough to be considered an abuse of the technique, but hey, it's nice eye candy and Part I: Introduction 47 48 Part I: Introduction good enough for demo purposes. The fade animation here is super-simplistic. In 10 steps, each 100 milliseconds apart, it pumps up the RGB value from (100%, 100%, 0%) to (100%, 100%, 100%). That is, from yellow to white. className = "notWaiting"; fade(0); ... } Now click on Find Anagrams! and enjoy the hypnotic Ajax fade effect (Figure 2-6).

Br/>"; }; } So what we want to do is catch the event of a user clicking on the sandbox. innerHTML = Clicked at " + new Date() + ". innerHTML += message; } }; Clicking on the sandbox triggers the event handler, which outputs the event contents, shown in Figure 2-3. Figure 2-3. onclick to an anonymous function that will handle the event. That's one common way of registering an event handler. onmouseover if we want to capture mouse movement instead of clicking activity. Browsers usually generate an event object with information about what just happened, such as the time and mouse location.

Ajax Patterns Overview The Ajax Patterns show how people have used the design principles effectively in real-world Ajax applications. It might seem funny that we can have so many patterns about Ajax, a term that was coined only a few months before work on these patterns began. However, the ideas are not new; there were many Ajax features on the Web before the term came about to describe them. The healthy Net economy has helped a lot too, with hundreds of new sites now using Ajax, along with powerful tools (RSS, Technorati, Google, and wikis) to locate them as soon as they're available.

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