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How Ajax is different?

AJAX allows for asynchronous processing of events. This is different from the traditional sequential events that a users is used to, instead, a user can fire multiple events, each of which process executes independent of each other, enhancing the user experience. In traditional web applications, every time a user triggered an event, the request was sent to the server and the complete page was rendered again as a result of that. AJAX allows for partial page rendering which enable a user to trigger multiple events through different portions of the same web page.