Merge pull request #12 from Carifio24/no-dev-ga

Don't use Google Analytics on a local network
cosmicds · Sep 6, 2024 · f35c406 · f35c406
2 parents a62e304 + e96344d
commit f35c406
Showing 1 changed file with 19 additions and 6 deletions.
diff --git a/public/index.html b/public/index.html
@@ -2,14 +2,27 @@
 <html lang="en">
 
 <head>
-  <!-- Google tag (gtag.js) -->
-  <script async src="https://www.googletagmanager.com/gtag/js?id=G-C2ELSYY9VC"></script>
+  <!-- Google Analytics -->
   <script>
-    window.dataLayer = window.dataLayer || [];
-    function gtag(){dataLayer.push(arguments);}
-    gtag('js', new Date());
+    // Logic derived from https://stackoverflow.com/a/61839170
+    const local = (function (hostname=window.location.hostname) {
+      return (
+        (['localhost', '127.0.0.1', '', '::1'].includes(hostname))
+        || (hostname.startsWith('192.168.'))
+        || (hostname.startsWith('10.'))
+      )
+    })();
+    if (!local) {
+      const script = document.createElement("script");
+      script.async = true;
+      script.src = "https://www.googletagmanager.com/gtag/js?id=G-C2ELSYY9VC";
+      document.head.appendChild(script);
+      window.dataLayer = window.dataLayer || [];
+      function gtag(){dataLayer.push(arguments);}
+      gtag('js', new Date());
 
-    gtag('config', 'G-C2ELSYY9VC');
+      gtag('config', 'G-C2ELSYY9VC');
+    }
   </script>
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">