HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery button selector compare</title>
  <style>
    #log { font-family: monospace; white-space: pre-line; margin-top: 12px; }
  </style>
</head>
<body>
  <input type="button" value="Input Button">
  <button type="button">Button tag</button>
  <input type="submit" value="Submit">
  <div id="log"></div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var lines = [
      ":button → " + $(":button").length,
      "button tag → " + $("button").length,
      "input[type=button] → " + $("input[type='button']").length
    ];
    $("#log").text(lines.join("\n"));
  </script>
</body>
</html>

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jQuery :button vs button vs input (Try It)