Edit This Code:
<!DOCTYPE html>
<html>
<body>

<h2>Using the XMLHttpRequest object</h2>

<button type="button" onclick="loadXMLDoc()">Change Content</button>

<p id="demo"></p>

<script>
function loadXMLDoc() {
  var xmlhttp;
  if (window.XMLHttpRequest) {
    xmlhttp = new XMLHttpRequest();
  } else {
    // code for older browsers
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  }
  xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
      document.getElementById("demo").innerHTML =
      xmlhttp.responseText;
    }
  };
  xmlhttp.open("GET", "xmlhttp_info.txt", true);
  xmlhttp.send();
}
</script>

</body>
</html>


Result:
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