HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>removeAttributeNode return value</title>
  <style>
    #box { padding: 12px; border: 1px solid #ccc; margin: 8px 0; }
  </style>
</head>
<body>
  <div id="box" title="Hello">Hover me (title will be removed)</div>
  <button type="button" id="btn">remove title Attr</button>
  <pre id="out">—</pre>
  <script>
    document.getElementById("btn").addEventListener("click", function () {
      var el = document.getElementById("box");
      var titleAttr = el.getAttributeNode("title");
      var removed = el.removeAttributeNode(titleAttr);
      document.getElementById("out").textContent =
        removed.name + "\n" + removed.value;
    });
  </script>
</body>
</html>

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Element.removeAttributeNode — returned Attr (Try It)