When we view certain websites, we are after the data that is in it. And a whole page is normally not enough to hold everything we want to know, therefore there is a need to link the current page to the next one. But sometimes we don’t need to or even want to change the whole page, just the a certain section in it. For example, we have a shoutbox in a page, we wouldn’t want the whole page to reload whenever a new entry appears on the screen.
The first to provide this sort of functionality was Java, providing little compiled applets that can load data asynchronously. Later on, AJAX provided the standard the allowed coders to request data asynchronously in order to change the load new data without changing the web page.
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