AJAX Request with XHR object

ajax_request.js

const request = new XMLHttpRequest();

function myFunction() {
  request.onreadystatechange = function() {
    if (this.readyState == XMLHttpRequest.DONE && this.status == 200) {
      let response = JSON.parse(this.responseText);
      console.log(response);
    }
  }
  request.open('GET', 'https://www.mywebservice');
  request.send();
}