fix: initial URL parameters

Ensure initial URL parameters are set before
page-load event.

Author: micwallace

javascript/tokenscript-viewer/src/index.html

@@ -29,7 +29,14 @@
 	function gtag(){dataLayer.push(arguments);}
 	gtag('js', new Date());
 
-	gtag('config', 'G-0YTFX5PTEZ');
+	const query = new URLSearchParams(document.location.search.substring(1));
+
+	gtag('config', 'G-0YTFX5PTEZ', {
+		'viewer_type': query.has("viewType") ? query.get("viewType") : "default",
+		'chain': query.get("chain"),
+		'contract': query.get("contract"),
+		'scriptId': query.get("scriptId")
+	});
 </script>
 
 <app-root></app-root>