AJAX Response

document.getElementById("demo").innerHTML = xhttp.responseText;

const xmlDoc = xhttp.responseXML;
const x = xmlDoc.getElementsByTagName("ARTIST");

let txt = "";
for (let i = 0; i < x.length; i++) {
  txt += x[i].childNodes[0].nodeValue + "<br>";
}
document.getElementById("demo").innerHTML = txt;

xhttp.open("GET", "/files/names.xml");
xhttp.send();

const xhttp = new XMLHttpRequest();
xhttp.onload = function() {
    document.getElementById("demo").innerHTML =
    this.getAllResponseHeaders();
}
xhttp.open("GET", "/files/ajax.txt");
xhttp.send();

const xhttp = new XMLHttpRequest();
xhttp.onload = function() {
    document.getElementById("demo").innerHTML =
    this.getResponseHeader("Last-Modified");
}
xhttp.open("GET", "/files/ajax.txt");
xhttp.send();