Jeevan Kumar Gogineni Instructor, Dr.

Khalili Bahram

 History of Web Applications  What is Ajax?

 Two real Applications of Ajax  Why Ajax in Web Applications?

 Different Technologies in Ajax  How each Technology interacts in Ajax Applications  Important Notes about Ajax

 The fundamental purpose of all web applications is to facilitate the completion of one or more tasks.”  User at browser interacts with application at Web Server  Web Server Application sends HTML to Web user agents for human display using HTTP.

 Using traditional methods, the whole content would have to be reloaded on every request.

 AJAX is A synchronous J avaScript A nd X ML  Ajax is not a new programming language but only a new technique which combines mature programming languages for web applications.

 Ajax Technologies to improve web application responsiveness, performance as well as interactivity.  Ajax applications are used to build Rich Internet Application’s (RIA).

 The Rich Internet Application’s can also be created using Adobe Flash, JavaFX and Microsoft Silverlight.

 Gmail  Google Map  Google Suggest Page  The Future Application will follow this pattern. http://www.dewspot.com/ http://monket.net/wiki-v2/Main_Page

 In Ajax applications, page reloading is not required.  Ajax minimizes the Network traffic because it just requests what the user needs instead of the whole document.

 Ajax makes the web applications look like a normal desktop application.  Terrific Interaction.

 Ajax application’s generally have higher response time than Traditional HTML applications  It was worth mentioning that Ajax works across platforms and it works regardless of any platform because it uses only basic languages like HTML, Java etc.

 Java Script  XMLHttpRequest  DOM  XHTML & CSS  XML & XSLT

 XMLHttpRequest –For Asynchronous Communication  DOM – Dynamic Display & Data Interaction  XHTML & CSS – Look on the Browser  XML & XSLT – For Data Processing  Java Script - Gets all these Technologies together

 The technology was brought in early 1990’s and was used to full extent only from mid 2000’s.

  Google was the one which spotted this technology and used in different applications like Gmail, Google Maps, etc which provided user interface that was much more like a web application. Old applications like Calendar applications are all now getting converted in to Ajax applications.

 Security aspects in Ajax and normal web applications are same and which needs a good focus on.

 Do we only need JavaScript for Making Ajax Applications: No VBScript, .NET etc. also be used.

 Do we only need XML for data transfer and Manipulation in Ajax Applications: No, JavaScript Object Notation (JSON) etc.

 Can Rich Internet Applications are only built with Ajax.

No. Adobe Flash, JavaFX and Microsoft Silverlight.  So Don’t mention as Acronym AJAX but as term Ajax.