AJAX and XMLHttpRequest Object

AJAX stands for Asynchronous JavaScript And XML.
AJAX is not a programming language, but it is a set of existing web technologies.
AJAX helps in fetching data asynchronously from a remote web server.
When the data is loaded by AJAX, it is loaded asynchronously without page reload / refresh.
Modern websites uses JSON format instead of XML for data transfer.

In this lecture let’s understand What is AJAX and how to make an AJAX call from our JavaScript code using XMLHttpRequest object.

HTTP Status codes: https://www.restapitutorial.com/httpstatuscodes.html