A Brief about Ajax Application Development

Asynchronous JavaScript and XML, commonly known as Ajax is a web development tool that is used to create interactive web applications. It is mainly an amalgamation of several technologies, each having specialties of its own and becoming more powerful when integrated together. Ajax includes XTML and CSS for standard based presentation, Document Object Model for dynamic display and interaction, XML and XSLT for data interchange and manipulation, XML Http Request for asynchronous data retrieval and JavaScript for holding everything together. While exchanging data with the web server, it uses client side scripting which enables independent communication with the server. Ajax application development is gaining popularity day by day as it is supported by most of the browsers.

In the classic web application model, a user has to wait every time an Http request is sent to the server for processing an HTML web page to the client. In the Ajax application model, an Ajax engine is introduced between the user and the server which eliminates the need of waiting for the server’s response. The engine is loaded every time by the browser whenever a session is initiated. It allows asynchronous communication between the user and the application. As a result the speed, interactivity and usability of the web pages are greatly increased. Using Ajax, the user fetches small chunks of data from the server behind the scene and not the complete set of information. Simple processes such as data validation, data editing memory are handled by the Ajax engine. If it needs help from the server, those requests are made asynchronously, using XML. From simple to complex, Ajax applications can be of any size. It is an important development that has been made in the world of web applications and its importance is growing every day.

There are many Ajax web development companies, lending their valuable services in integrating Ajax. It has been used by many big companies in the world of the web. Many products of Google like Gmail, Orkut and sophisticated Google maps are based on Ajax technology. Likewise, the Yahoo maps are also dependent on this technology.

Online Ajax Tutorials - A New Approach to Learning to Create a Benchmark

It is the next generation web programming through Ajax. Web programmers are grabbing this opportunity to move from what is usually the case of the standard or classical technology used for web pages and introduce a new way for the server, browser and webpage to work simultaneously through Ajax. Ajax stands for Asynchronous JavaScript and XML with the use of nonstandard XMLHttpRequest object to communicate with server-side scripts. It can send as well as receive information in a variety of formats, including XML, HTML, and even text files and with the least necessity of having to refresh. Ajax is of an “asynchronous” nature and creating a revolution online with Ajax tutorial as your support system. Just a PC with net can provide you knowledge that will prove worth while only when you are in need for a leading edge.

It is but quite a task to refer the right resource of Ajax tutorial available today to solve browser, user and various other problems that may occur. It is to know how Ajax is one of the better ways to use XMLHTTP. The next that comes with it is to learn about Ajax tutorial termed as Ajax in Action such as the programming used for Google Maps and Google Suggest where a particular search term when entered into the Google Suggest search engine opens a drop-down list of suggested search terms that updates as something is added to the search term. By using this new technology available through Ajax tutorials online, this list is continuously updated without the wait needed to reload your webpage. The benefit of programming with Ajax is new, more responsive web applications for your website and for this very reason Yahoo now uses Ajax in their Search Engine’s interface. This and more can now referred at the click of a button with Ajax tutorial with enormous knowledge waiting to enhance to better the technical knowledge that is required.

Knowing how to add Ajax in-progress indicators can serve fruitful. To get into a detailed study with Rasmus’ 30 second AJAX Tutorial, to make our knowledge go that extra mile by adding the spinning icon after “Get Results” link to indicate the result seeker to wait a while the search is refined and output is given are all relevant to Ajax tutorial. Ajax tutorial gives a lot of insight on Ajax wire framing approaches to introduce to their knowledge the concept of prototyping as a solution to the problem of representing Ajax at the early stages of designing an interface. The general strategies and attitudes should be considered important. The FAQ are worth following to add AJAX functionality to an application. Just a look at the category for Ajax tutorial and you have already made a head start in you r effort to gain the utmost out of the informative approach through e-learning.

So - how do you find out more about Ajax and how it interacts with the system?

Before I found this weblog I though Ajax was something we used to clean the bathroom. (haha) Now I understand some of the potential weakness and strength that has to do with the scripting. I would like to know how others managed to find tutorials that were appropriate and learner friendly for the run of the mill computer junkie?

Practical Javascript, DOM Scripting, and Ajax Projects

Practical Javascript, DOM Scripting, and Ajax Projects picks up where Beginning JavaScript with DOM Scripting and Ajax left off.

Frank Zammetti’s practical guide to real-world JavaScript and Ajax will have you developing actual client-side apps in no time. As more of a hacker than a theoretician, this kind of guide appeals to me. Usually when I start developing my own apps, some of the code used previously (in building sample apps) will be adapted and tweaked for my own purposes.

Some of the projects you’ll learn how to build in Practical Javascript:
* JSDigester - a library that simplifies (takes away the pain) of parsing XML on the client side
* Mashing up a list of hotels + a Yahoo Map for a user-entered zipcode
* Client-side persistence techniques
* A JavaScript validation framework
* Building widgets and working with UI widget frameworks
* Building a JavaScript mini-game (cool!)
* An Ajax-based client-server chat pplication

You can pick up a copy of Practical Javascript, DOM Scripting, and Ajax Projects at Amazon.com (avg. review score is 4.5 stars).

Beginning JavaScript with DOM Scripting and Ajax

Beginning JavaScript with DOM Scripting and Ajax will take you from knowing absolutely nothing about JavaScript to being able to manipulate the DOM, build basic Ajax applications and more.

Most of us who have been building websites since the pre-Ajax days learned JavaScript through a mish-mash of one-off scripts, validations, etc. If a book like this had been around, it surely would’ve offered a nice clean overview of the techniques available to the JavaScript programmer.

Luckily for the novice JavaScript programmer (or intermediate developer wishing to hone his craft), Beginning Javascript with DOM Scripting and Ajax does exist now and is the perfect way to learn the fundamentals from the ground up. The 2nd part of the book also focuses on Ajax and some of the interesting hacks one can use in that realm.

The author, Christian Heilmann, has a geeky sense of humor that keeps the reading light — for eaxmple Et Tu, Cache? (pg. 309):

Safari is the main offender as it caches the response status and does not trigger the changes (remember that the status returns the HTTP code 200, 304 or 404) any longer.

Adding this snippet tells the browser to test whether the data has changed since a certain date, i.e.:

request.setRequestHeader( ‘If-Modified-Since’, ‘Thu, 06 Apr 2006 00:00:00 GMT’);
request.send( null );

A bit out of context here, but just one example of the kind of thing you’ll find in Beginning JavaScript with DOM Scripting and Ajax.

Review: Beginning Ajax with PHP

Beginning Ajax with PHP (by Lee Babin) is a good introduction to learning JavaScript client-server techniques on the PHP platform.

Some of the scenarios Lee walks you through:
* Sexy client-side Calendars (that can be built / communicate with the server)
* Auto-completion (a la GMail’s compose recipient, etc)
* Form validation (that leverages Ajax)
* Dynamic thumbnail generation
* etc

The book then walks one through creating a real-world Ajax-powered photo gallery app. Lee also touches on interacting with SOAP web services and the Google Maps API.

All in all, definitely worth a read if you are a PHP developer and are looking for a good primer on Ajax-based technologies.

Beginning Ajax with PHP (Amazon)

Huge list of Ajax tutorials

Just found this list of 126 Ajax Tutorials over the weekend — here’s a sampling:

• Ajax Workshop 3: Shopping Cart using Script.aculo.us at AjaxLessons
• Building an AJAX-Based Chat: The Barebones Structure at DevArticles
• Dynamically loaded articles at DHTMLGoodies
• Slide Show with Controls at Zapatec
• Ajax for Java developers: Build dynamic Java applications at IBM
• Create Your Own Ajax Effects animated text; at ThinkVitamin
• Make all your tables sortable at Kryogenix
• Ajax Design Patterns at Snyke
• Ajax Poller at DHTMLGoodies

Really huge, excellent list. Check it out…

Google AJAX development toolkit

Google donates OpenSource software development tool with all the AJAX fun in it, makes creating AJAX applications much easier. With Google Web Toolkit (Beta) , you can develop and debug your own AJAX applications in Java code using the Java development tools of your choice. When you deploy your application to production, the GWT compiler simply translates your Java application to browser-compliant JavaScript and HTML.

Pixsy - Image Search

Pixsy is indeed a upgraded image search. Apart from the fact that it does not use any third party service of Google or Yahoo! search like backbase , it is a powerful system of its own.

Image search is the fastest growing vertical search category on the Internet today. To address the problem of finding the growing amount of visual material available online, Pixsy has developed a proprietary visual search engine that delivers images based on the context surrounding those images. To find that context, our spider aggregates RSS feeds and extracts photos and video thumbnail images from those feeds and – in most cases – from the stories, articles, blogs, reviews and stores linked from those feeds. Our spider then indexes and organizes those images into categories, and makes them searchable for users.

Rail Adds Ajax

Version 1.1 of application development framework Rails went live earlier this week, with more than 500 fixes and additions, including simplified Ajax programming. (See Information Week for more.)

“It makes Web application programming a lot more like desktop GUI [graphical user interface] programming,” said Jeremy Voorhis, lead architect at Planet Argon, a Portland, Ore., services firm that specializes in Ruby on Rails development. Planet Argon has already used RJS on several client projects. Because Rails is an open source project, developers can start working with new features before they make their way into a formal release.

Rails is a two-year-old open source development application used by sites such as Calendar Hub. For more information, visit the Rails Website.

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