AJAX is a developer’s dream, because you can:
- Update a web page without reloading the page
- Request data from a server – after the page has loaded
- Receive data from a server – after the page has loaded
- Send data to a server – in the background
AJAX is not a programming language.
AJAX just uses a combination of:
- A browser built-in XMLHttpRequest object (to request data from a web server)
AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.