browser_sessionStorage.html

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<!DOCTYPE html>

<html lang="en">

  <head>

    <meta charset="utf-8">

    <title>browser_sessionStorage.html</title>

  </head>

  <body>

    <iframe id="iframe"></iframe>

    <script type="text/javascript">

      let isOuter = window == window.top;

      let args = window.location.search.slice(1).split("&");

      let rand = args[0];

      if (isOuter) {

        let iframe = document.getElementById("iframe");

        let isSecure = args.indexOf("secure") > -1;

        let scheme = isSecure ? "https" : "http";

        iframe.setAttribute("src", scheme + "://example.com" + location.pathname + "?" + rand);

      if (sessionStorage.length === 0) {

        sessionStorage.test = (isOuter ? "outer" : "inner") + "-value-" + rand;

        document.title = sessionStorage.test;

    </script>

  </body>

</html>