Technology does not drive change, it enables change

AJAX is a term used to describe an approach to designing and implementing web applications. It is an acronym for Asynchronous JavaScript and XML.


The primary purpose of AJAX is to help make web applications function more like desktop applications. HyperText Markup Language (HTML), the language that drives the World-Wide Web, was designed around the idea of hypertext – pages of text that could be linked within themselves to other documents. For HTML to function, most actions that an end-user takes in his or her browser send a request back to the web server. The server then processes that request, perhaps sends out further requests, and eventually responds with whatever the user requested.


Advantages and Disadvantages of Ajax


While there are a number of advantages to using Ajax, there are also some disadvantages as well. One of the main reasons why people support it is the interface. Those who use pages with Ajax will find that they operate more like an application rather than a standalone program. With normal web pages, users will have to click on a link if they wish to refresh the page.


This can become tedious and inefficient. With Ajax, the page can be refreshed dynamically. The response of the interface to the actions of the user is much faster. Even though Ajax has not yet reached its full capabilities, it is easy to see what is is capable of.


Another issue that surrounds Ajax is the use of bandwidth. When HTML is generated within a browser via JavaScript, the Ajax pages can seem to load much faster. The reason for this is because the payload is much smaller. One example of this is a set in which numerous pages exist. When Ajax is used, the table structure connected to TD can be produced in a browser, and it doesn't have to be initiated with the first part of the document. It should also be noted that some web applications will load pieces of event handlers as the program operates. This technique is useful because it reduces the demand for bandwidth. Since more applications have become complex, this is an issue that must be addressed in the future.


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