XMLHttpRequest tutorial - GET & POST data using Vanilla JavaScript AJAX

XMLHttpRequest tutorial - GET & POST data using Vanilla JavaScript AJAX request (Ajax tutorial and what is ajax)

The XMLHttpRequest object is used to send a request to any API and get a response from it which will contain data in a JSON format, this is known as AJAX technology

We won't use Jquery for this, just Vanilla JavaScript using the XMLHttpRequest object

We will learn how to send data to the server using the POST HTTP method (or PUT) and how to get Data from the server using the GET HTTP method and we are going to deal with the response we get from the server using the onload event handler

We will also learn how to handle errors after getting the response from our XMLHttpRequest request