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<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
</head>
<body>
  <script>
    try {
      alert(hasOwnProperty('window'));
    } catch(e) {
      alert(e); // Type Error : can't convert undefined to object
    }
    try {
      alert(this.hasOwnProperty('window')); // true (if on browser)
    } catch(e) {
      // through catch block
      alert(e);
    }
  </script>
</body>
</html>
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anonymouspro
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