AJAX
AJAX (Asynchronous JavaScript and XML) is a web development technique used to create dynamic and interactive web applications. It allows a webpage to send requests to a server and receive responses without reloading the entire page. This makes websites faster and more user-friendly, as only the required data is updated instead of refreshing the whole page.
AJAX works by using JavaScript along with built-in browser objects like XMLHttpRequest or the modern fetch API. These tools help in sending data to the server and receiving responses asynchronously. Although XML was originally used for data exchange, AJAX now commonly uses JSON, HTML, or plain text because they are lighter and easier to work with.
One of the main benefits of AJAX is improved performance and user experience. Actions such as form submission, search suggestions, live data updates, and partial page loading can be handled smoothly without interrupting the user. This reduces server load and saves bandwidth by transferring only necessary data.