Merge pull request #802 from ethereum-optimism/sc/fix-ga

cpengilly · web-flow · commit 5ec0a10f91a7 · 2024-07-23T10:21:56.000-07:00
feat: add GA natively instead of via netlify injection
diff --git a/pages/_app.mdx b/pages/_app.mdx
diff --git a/pages/_app.tsx b/pages/_app.tsx
@@ -0,0 +1,20 @@
+import '../styles/global.css'
+
+import { useEffect } from 'react'
+import { useRouter } from 'next/router'
+import * as gtag from '../utils/gtag'
+
+export default function App({ Component, pageProps }) {
+  const router = useRouter()
+  useEffect(() => {
+    const handleRouteChange = (url) => {
+      gtag.pageview(url)
+    }
+    router.events.on('routeChangeComplete', handleRouteChange)
+    return () => {
+      router.events.off('routeChangeComplete', handleRouteChange)
+    }
+  }, [router.events])
+
+  return <Component {...pageProps} />
+}
diff --git a/pages/_document.tsx b/pages/_document.tsx
@@ -0,0 +1,36 @@
+import Document, { Html, Head, Main, NextScript } from 'next/document'
+
+import { GA_TRACKING_ID } from '../utils/gtag'
+
+export default class MyDocument extends Document {
+  render() {
+    return (
+      <Html>
+        <Head>
+          {/* Global Site Tag (gtag.js) - Google Analytics */}
+          <script
+            async
+            src={`https://www.googletagmanager.com/gtag/js?id=${GA_TRACKING_ID}`}
+          />
+          <script
+            dangerouslySetInnerHTML={{
+              __html: `
+            window.dataLayer = window.dataLayer || [];
+            function gtag(){dataLayer.push(arguments);}
+            gtag('js', new Date());
+
+            gtag('config', '${GA_TRACKING_ID}', {
+              page_path: window.location.pathname,
+            });
+          `,
+            }}
+          />
+        </Head>
+        <body>
+          <Main />
+          <NextScript />
+        </body>
+      </Html>
+    )
+  }
+}
diff --git a/utils/gtag.ts b/utils/gtag.ts
@@ -0,0 +1,17 @@
+export const GA_TRACKING_ID = process.env.NEXT_PUBLIC_GA_ID
+
+// https://developers.google.com/analytics/devguides/collection/gtagjs/pages
+export const pageview = (url) => {
+  (window as any).gtag('config', GA_TRACKING_ID, {
+    page_path: url,
+  })
+}
+
+// https://developers.google.com/analytics/devguides/collection/gtagjs/events
+export const event = ({ action, category, label, value }) => {
+  (window as any).gtag('event', action, {
+    event_category: category,
+    event_label: label,
+    value: value,
+  })
+}
