What is AJAX?

AJAX (Asynchronous JavaScript and XML) is a web development technique used to create dynamic websites. It allows data to be exchanged between a browser and a server without requiring a full page reload. AJAX enables parts of a webpage to update without having to synchronize with the rest of the page.

Although it was originally designed to work with XML, AJAX now commonly uses JSON due to its lighter weight and easier integration with JavaScript. It forms the foundation for many modern web applications and frameworks.