<!DOCTYPE HTML>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <title></title>
</head>
<body>

<style type="text/css">
  /* ※注目1※ */
  :unresolved {
    visibility: hidden;
  }
</style>

<link rel="import" href="sample.html">
<x-sample></x-sample>
<x-sample2></x-sample2>
<sample></sample>

</body>
</html>