HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>getAttributeNames empty</title>
</head>
<body>
  <pre id="out"></pre>
  <script>
    var div = document.createElement("div");
    document.getElementById("out").textContent =
      JSON.stringify(div.getAttributeNames()) + "\nlength === 0: " +
      (div.getAttributeNames().length === 0);
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

Element.getAttributeNames — empty array (Try It)