JSFiddle - React, Tailwind, and code Playground

JavaScript

function getDeliveryMethods(){
  var msg = new XMLRPCMessage("eshop.getDeliveryMethods", "utf-8");
  var msgStr = msg.xml();

  var req = getXmlHttpRequest();
  req.open("POST", "lab-4-server.php", true);
  req.setRequestHeader("Content-Type", "text/xml");
  req.send(msgStr);

  req.onreadystatechange = function() {
    if (req.readyState != 4) return;
    var dom = req.responseXML;
    console.log(dom);
  }	
}