The term Ajax has come to represent a broad group of web technologies that can be used to implement a web application that communicates with a server in the background, without interfering with the current state of the page. In the article that coined the term Ajax, Jesse James Garrett explained that the following technologies are required:
HTML or XHTML and CSS for presentation.
The Document Object Model for dynamic display of and interaction with data.
XML for the interchange of data, and XSLT for its manipulation.
The XMLHttpRequest object for asynchronous communication.
Since then, however, there have been a number of developments in the technologies used in an Ajax application, and the definition of the term Ajax. In particular, it has been noted that:
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