Ajax (also
AJAX; ; short for
asynchronous JavaScript and XML) is a set of
web development techniques using many web technologies on the
client-side to create
asynchronous Web applications. With Ajax, web applications can send data to and retrieve from a
server asynchronously (in the background) without interfering with the display and behavior of the existing page. By decoupling the data interchange layer from the presentation layer, Ajax allows for web pages, and by extension web applications, to change content dynamically without the need to reload the entire page. Data can be retrieved using the
XMLHttpRequest object. Despite the name, the use of XML is not required (
JSON is often used in the
AJAJ variant), and the requests do not need to be asynchronous.
