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<!DOCTYPE html> <html> <body> <p>The getResponseHeader() function is used to return specific header information from a resource, like length, server-type, content-type, last-modified, etc.</p> <p>Last modified: <span id="demo"></span></p> <button onclick="loadDoc('ajax_info.txt')">Get "Last-Modified" information</button> <script> function loadDoc(url) { var xhttp=new XMLHttpRequest(); xhttp.onreadystatechange = function() { if (xhttp.readyState == 4 && xhttp.status == 200) { document.getElementById("demo").innerHTML = xhttp.getResponseHeader('Last-Modified'); } }; xhttp.open("GET", url, true); xhttp.send(); } </script> </body> </html>
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