Update index.html

index.html

@@ -5,22 +5,39 @@
         <script>
             eruda.init();
         </script>
-      <!-- Google tag (gtag.js) -->
-      <!-- Google Tag Manager -->
-<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
-new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
-j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
-'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
-})(window,document,'script','dataLayer','GTM-NDL2LKLQ');</script>
-<!-- End Google Tag Manager -->
-<script async src="https://www.googletagmanager.com/gtag/js?id=G-2M35HBEEVH"></script>
 <script>
-  window.dataLayer = window.dataLayer || [];
-  function gtag(){dataLayer.push(arguments);}
-  gtag('js', new Date());
+  function isAdmin() {
+    return document.cookie.includes("admin_access=true");
+  }
+
+  if (!isAdmin()) {
+    // Google Tag Manager
+    (function(w,d,s,l,i){
+      w[l]=w[l]||[];
+      w[l].push({'gtm.start': new Date().getTime(), event:'gtm.js'});
+      var f=d.getElementsByTagName(s)[0],
+          j=d.createElement(s),
+          dl=l!='dataLayer'?'&l='+l:'';
+      j.async=true;
+      j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;
+      f.parentNode.insertBefore(j,f);
+    })(window,document,'script','dataLayer','GTM-NDL2LKLQ');
+
+    // Google Analytics (gtag.js)
+    var gtagScript = document.createElement('script');
+    gtagScript.async = true;
+    gtagScript.src = "https://www.googletagmanager.com/gtag/js?id=G-2M35HBEEVH";
+    document.head.appendChild(gtagScript);
 
-  gtag('config', 'G-2M35HBEEVH');
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
+    gtag('config', 'G-2M35HBEEVH');
+  } else {
+    console.log("管理者のため、Googleタグはスキップされました。");
+  }
 </script>
+
 <script>
 document.addEventListener("DOMContentLoaded", () => {
   if (localStorage.getItem("admin") !== "1") {