Update absolute root

Author: TaerangLee

projects/client/src/app/layout.tsx

@@ -7,7 +7,7 @@ import { Header } from 'common';
 
 import Script from 'next/script';
 
-import * as gtag from '../libs/gtag';
+import * as gtag from 'client/libs/gtag';
 
 import Providers from './providers';
 

projects/client/src/libs/gtag.ts

@@ -0,0 +1,21 @@
+export const GA_TRACKING_ID = process.env.NEXT_PUBLIC_GA_ID;
+
+// https://developers.google.com/analytics/devguides/collection/gtagjs/events
+export const event = (
+  action: Gtag.EventNames,
+  { event_category, event_label, value }: Gtag.EventParams
+) => {
+  window.gtag('event', action, {
+    event_category,
+    event_label,
+    value,
+  });
+};
+
+// https://developers.google.com/analytics/devguides/collection/gtagjs/pages
+export const pageview = (url: URL) => {
+  if (GA_TRACKING_ID)
+    window.gtag('config', GA_TRACKING_ID, {
+      page_path: url,
+    });
+};