HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>vendorSub — type</title>
</head>
<body>
  <pre id="out"></pre>
  <script>
    var v = navigator.vendorSub;
    var lines = [
      "value: " + JSON.stringify(v),
      "typeof: " + typeof v,
      "length: " + v.length,
      "is undefined?: " + (v === undefined),
      "is null?: " + (v === null)
    ];
    document.getElementById("out").textContent = lines.join("\n");
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

vendorSub — type and length (Try It)