Pros and Cons of AJAX

Advantages:
  • Independent of server technology.
  • Apart from obtaining the XMLHTTP object, all processing is same for all browser types, because Javascript is used.
  • Permits the development of faster and more interactive web applications.
  • Ajax allows to perform processing on client computer (in JavaScript) with data taken from the server thereby reducing server load by moving a part of server functionality to client side. 
Disadvantages:
  • The back button problem. People think that when they press back button, they will return to the last change they made, but in AJAX this doesn not hold.
  • Possible network latency problems. People should be given feedback about the processing.
  • Does not run on all browsers.
  • If JavaScript is not activated, Ajax can't works. The user must be asked to set JavaScript from within options of the browser, with the "noscript" tag



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