AJAX (Asynchronous JavaScript and XML) is a web development technique that allows for the asynchronous exchange of data between a web browser and a web server.
This technique enables highly interactive and fast web applications.
AJAX works by exchanging small amounts of data with a web server behind the scenes. Parts of a web page can be updated without needing to reload the entire page. This can significantly improve a web application's interactivity, speed, and usability.
Some key aspects of AJAX:
- Typically uses XMLHttpRequest (XHR) object to exchange data asynchronously with a web server, but can also use other asynchronous communication approaches (e.g., Fetch API, WebSockets).
- Allows web pages to dynamically display new content and update small sections of HTML without a full page reload.
- Enables rich interactive user experiences and real-time updates to content on a webpage.
- Used extensively in modern web application development to connect HTML frontend code seamlessly with backend databases and servers.