reflect_local_storage_into_title.html

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<html>

  <head>

    <meta charset="utf-8" />

    <title>no title</title>

    <script>

      // If we have a query string, save it to the local storage.

      if (window.location.search.length) {

        const value = window.location.search.substr(1);

        localStorage.setItem("ctx", value);

      // Set the title to reflect the local storage value.

      document.title = "storage=" + localStorage.getItem("ctx");

    </script>

  </head>

  <body></body>

</html>