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<!DOCTYPE html>
<html>
<body>
​
<h2>The XMLHttpRequest Object</h2>
​
<p>The getAllResponseHeaders() function returns all the header information of a resource, like length, server-type, content-type, last-modified, etc:</p>
​
<p id="demo"></p>
​
<script>
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
  if (this.readyState == 4 && this.status == 200) {
    document.getElementById("demo").innerHTML =
    this.getAllResponseHeaders();
  }
};
xhttp.open("GET.html", "ajax_info.txt", true);
xhttp.send();
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_ajax_header by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:29:16 GMT -->
</html>
​
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