JAVASCRIPT AJAX

    //JAVASCRIPT AJAX
    < button type="button" onclick="loadDoc()">Change Content </button>
    function loadDoc() {
        const xhttp = new XMLHttpRequest();
        xhttp.onload = function() {
          document.getElementById("demo").innerHTML = this.responseText;
          }
        xhttp.open("GET", "ajax_info.txt", true);
        xhttp.send();
      }

    //JAVASCRIPT AJAX