Download PDF by Mahemoff, Michael: Ajax Design Patterns

By Mahemoff, Michael

ISBN-10: 0596101805

ISBN-13: 9780596101800

Ajax, or Asynchronous JavaScript and XML, exploded onto the scene within the spring of 2005 and is still the most popular tale between net builders. With its wealthy blend of applied sciences, Ajax offers astrong starting place for developing interactive internet purposes with XML or JSON-based internet companies by utilizing JavaScript within the browser to method the net server response.

Ajax layout Patterns exhibits you top practices that may dramatically increase your net 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 e-book fall into 4 categories:

  • Foundational know-how: Examines the uncooked applied sciences required for Ajax development
  • Programming: Exposes suggestions that builders have found to make sure their Ajax functions are maintainable
  • Functionality and usefulness: Describes the kinds of consumer interfaces you will stumble upon in Ajax functions, in addition to the recent varieties of performance that Ajax makes possible
  • Development: Explains the method getting used to watch, debug, and try out Ajax applications

Ajax layout Patterns also will get you up to the mark with center Ajax applied sciences, akin to XMLHttpRequest, the DOM, and JSON. Technical discussions are via code examples so that you can see for your self simply what is-and isn't-possible with Ajax. this convenient reference may also help you to supply top quality Ajax architectures, streamline internet software functionality, and enhance the userexperience.

Michael Mahemoff holds a PhD in computing device 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, wellbeing and fitness care, and logistics.

''Michael Mahemoff's Ajax layout Patterns is a really complete compendium of webapplication layout services, founded round yet now not restricted to Ajax ideas. Polished nuggets of layout knowledge are supported via tutorials and real-world code examples leading to a e-book thatserves not just as an intermediate to specialist instruction manual but in addition as an in depth reference for development wealthy interactive net applications.''
--Brent Ashley, distant scripting pioneer

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Additional resources for Ajax Design Patterns

Example text

How is the XMLHttpRequest callback mechanism used here? During a call, XMLHttpRequest progresses through several stages, from 0, before the connection's open, to 4, when the response has arrived. Here, we only care about that final state, so onreadystatechange ignores any prior states. At that stage, we have a complete response, but is it valid? We have to check that the header has a successful response code, which is 200. responseText will then hold the content that was retrieved from the server.

This advice is commonly misinterpreted as implying "keep the presentation simple," a mistake that unfortunately leads to pathetically barren user interfaces. Don't be afraid to create rich, intelligent user interfaces with JavaScript; just be sure to develop for compatibility and ensure your business logic is separate from your presentation logic. " That is, keep your initial HTML page clean by referencing external JavaScript and CSS files; no embedded JavaScript or CSS. JavaScript and CSS should be kept apart too; where possible, the Part I: Introduction 57 58 Part I: Introduction script should change an element's display by switching its CSS class rather than micromanaging style information directly.

You may have a fancy new drag-and-drop technique for updating a form, but will the user even know it's possible? Visual design, dynamic icons, and status areas all help here. Smooth, continuous interaction Avoid the start-stop rhythm of conventional web apps. Full page refreshes are a distraction and a time-waster. If used at all, they should be reserved for significant, infrequent activities such as navigating to a conceptually new place or submitting a large form. Customization Application preferences haven't been very important on the Web.

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Ajax Design Patterns by Mahemoff, Michael


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