Javascript create element Link

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Javascript create element Link</title>
    <style>

    .tube {
      position: absolute;
      top: 10px;
      left: 10px;
      background-color: red;
      text-decoration: none;
      text-align: center;
      color: snow;
      font-family: arial black;
      padding: 5px 20px;
    }

     .link {
        position: absolute;
        top: 100px;
        font-size: 40px;
        font-family: verdana;
        text-decoration: none;
        border-bottom: 5px solid red;
    }


</style>
</head>
<body>

  <a class='tube' href='https://www.youtube.com/watch?v=UWWB-ggGPKA' target='_blank'>See it on YouTube</a>


  <script>

    link = document.createElement('a');
    document.body.appendChild(link);
    link.innerHTML = 'Javascript create element link';
    link.className = 'link';
    link.href = 'https://www.youtube.com/watch?v=UWWB-ggGPKA';
    link.target = '_blank';

</script>
</body>
</html>