HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>isXMLDoc — guard</title>

</head>

<body>

  <pre id="out"></pre>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    (function () {

      function readTitle(node) {

        if (!node || !node.getAttribute) {

          return null;

        }

        if ($.isXMLDoc(node)) {

          return node.getAttribute("title");

        }

        return node.getAttribute("title") || node.getAttribute("TITLE");

      }

      var xmlDoc = $.parseXML("<item title='XML Title'/>");

      var xmlNode = xmlDoc.documentElement;

      document.getElementById("out").textContent = [

        "xml title: " + readTitle(xmlNode),

        "html body: " + readTitle(document.body)

      ].join("\n");

    })();

  </script>

</body>

</html>

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