A short description about the technology AJAX to understand:- What it is? Why it's needed?

1. AJAX
PRESENTED BY
RISHAV ANURAG
Presentation on

2. Reason behind the Magic Suggestion:
AJAX

3. What is Ajax?
 Asynchronous JavaScript And XML
 A new Technology
 Not a Programming Language
 It is methodology on using several web technologies together to minimize
the gap between usability and interactivity of a web application .

4. Development
 Developed in 1990’s .
 First Microsoft included iframe in Internet Explorer in 1996 .
 Another technology ‘Microsoft Remote Script’ introduced by Microsoft in
1998 .
 XMlHttpRequest object, an ActiveX control, was introduced by Microsoft in
1999 .
 Renamed as AJAX by Jesse James Garret after Google introduced its Map .
 Finally, in 2006 it was announced as an official web standard by W3C .

5. Importance of AJAX
 Update a web page without reloading the page
 Do not load entire pages
 Request data from a server - after the page has loaded
 Receive data from a server - after the page has loaded
 Send data to a server - in the background

6. Technologies
 HTML & CSS : For presentation
 DOM(Document Object Model) : To interact with data dynamically
 JSON or XML : For manipulation of data
 XMLHttpRequest : To communicate data asynchronously
 JavaScript : To bring these technologies together
Nowadays JSON ( JavaSript Object Notation ) is used instead of XML

7. Life Cycle Of Web
Influenced By Ajax

9. Advantage Of Ajax
 More interactive
 Helps to build fast, dynamic websites
 Allows to perform processing on client computer with JavaScipt
 Reduces server traffic
 Ajax can modify a part of a page without reloading the browser

10. Disadvantage of AJAX
 Browser should support JavaScript or XMLHttpRequest , otherwise AJAX
will not work
 Refresh button is useless
 Don’t have URLs
 Debugging is difficult
 Problem with browser back button
 Screen readers are not able to read the AJAX properly
 Dynamic page updates may disrupt user interactions, particularly if the
Internet connection is slow

11. References
[1.] https://www.slideshare.net
[2.] https://en.wikipedia.org/wiki/Ajax_(programming)

12. Thank you