AJAX stands for Asynchronous JavaScript and XML. It is a set of web development techniques that use various web technologies on the client-side to create asynchronous web applications. With AJAX, web applications can send and retrieve data from a server asynchronously without interfering with the display and behavior of the existing page. AJAX is not a technology, but rather a programming concept that uses a combination of existing technologies, including HTML, CSS, JavaScript, DOM, XML, and the XMLHttpRequest object.
The XMLHttpRequest object is used to execute AJAX on web pages, allowing websites to load content onto the screen without refreshing the page. AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes, which means that it is possible to update parts of a web page without reloading the whole page. AJAX is commonly used to read data from a web server, update a web page without reloading the page, and send data to a web server.
AJAX is not a programming language, but rather a combination of technologies that use JavaScript and HTML DOM to display or use the data. AJAX applications might use XML to transport data, but it is equally common to transport data as plain text or JSON text.
