HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>hasAttribute disabled</title>
</head>
<body>
  <button id="submit" disabled>Submit</button>
  <button id="reset">Reset</button>
  <pre id="out"></pre>
  <script>
    document.getElementById("out").textContent =
      document.getElementById("submit").hasAttribute("disabled") + "\n" +
      document.getElementById("reset").hasAttribute("disabled");
  </script>
</body>
</html>

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Element.hasAttribute — disabled boolean (Try It)