feat: add analytics component

components/analytics/GoogleAnalytics.js

@@ -0,0 +1,36 @@
+import Script from 'next/script'
+
+import siteMetadata from '@/data/siteMetadata'
+
+const GAScript = () => {
+  return (
+    <>
+      <Script
+        strategy="lazyOnload"
+        src={`https://www.googletagmanager.com/gtag/js?id=${siteMetadata.analytics.googleAnalyticsId}`}
+      />
+
+      <Script strategy="lazyOnload">
+        {`
+            window.dataLayer = window.dataLayer || [];
+            function gtag(){dataLayer.push(arguments);}
+            gtag('js', new Date());
+            gtag('config', '${siteMetadata.analytics.googleAnalyticsId}', {
+              page_path: window.location.pathname,
+            });
+        `}
+      </Script>
+    </>
+  )
+}
+
+export default GAScript
+
+// https://developers.google.com/analytics/devguides/collection/gtagjs/events
+export const logEvent = (action, category, label, value) => {
+  window.gtag?.('event', action, {
+    event_category: category,
+    event_label: label,
+    value: value,
+  })
+}

components/analytics/Plausible.js

@@ -0,0 +1,27 @@
+import Script from 'next/script'
+
+import siteMetadata from '@/data/siteMetadata'
+
+const PlausibleScript = () => {
+  return (
+    <>
+      <Script
+        strategy="lazyOnload"
+        data-domain={siteMetadata.analytics.plausibleDataDomain}
+        src="https://plausible.io/js/plausible.js"
+      />
+      <Script strategy="lazyOnload">
+        {`
+            window.plausible = window.plausible || function() { (window.plausible.q = window.plausible.q || []).push(arguments) }
+        `}
+      </Script>
+    </>
+  )
+}
+
+export default PlausibleScript
+
+// https://plausible.io/docs/custom-event-goals
+export const logEvent = (eventName, ...rest) => {
+  return window.plausible?.(eventName, ...rest)
+}

components/analytics/SimpleAnalytics.js

@@ -0,0 +1,25 @@
+import Script from 'next/script'
+
+const SimpleAnalyticsScript = () => {
+  return (
+    <>
+      <Script strategy="lazyOnload">
+        {`
+            window.sa_event=window.sa_event||function(){var a=[].slice.call(arguments);window.sa_event.q?window.sa_event.q.push(a):window.sa_event.q=[a]};
+        `}
+      </Script>
+      <Script strategy="lazyOnload" src="https://scripts.simpleanalyticscdn.com/latest.js" />
+    </>
+  )
+}
+
+// https://docs.simpleanalytics.com/events
+export const logEvent = (eventName, callback) => {
+  if (callback) {
+    return window.sa_event?.(eventName, callback)
+  } else {
+    return window.sa_event?.(eventName)
+  }
+}
+
+export default SimpleAnalyticsScript

components/analytics/index.js

@@ -0,0 +1,18 @@
+import GA from './GoogleAnalytics'
+import Plausible from './Plausible'
+import SimpleAnalytics from './SimpleAnalytics'
+import siteMetadata from '@/data/siteMetadata'
+
+const isProduction = process.env.NODE_ENV === 'production'
+
+const Analytics = () => {
+  return (
+    <>
+      {isProduction && siteMetadata.analytics.plausibleDataDomain && <Plausible />}
+      {isProduction && siteMetadata.analytics.simpleAnalytics && <SimpleAnalytics />}
+      {isProduction && siteMetadata.analytics.googleAnalyticsId && <GA />}
+    </>
+  )
+}
+
+export default Analytics

data/siteMetadata.js

@@ -16,6 +16,12 @@ const siteMetadata = {
   youtube: 'https://youtube.com',
   linkedin: 'https://www.linkedin.com',
   locale: 'en-US',
+  analytics: {
+    // supports plausible, simpleAnalytics or googleAnalytics
+    plausibleDataDomain: '', // e.g. tailwind-nextjs-starter-blog.vercel.app
+    simpleAnalytics: false, // true or false
+    googleAnalyticsId: '', // e.g. UA-000000-2 or G-XXXXXXX
+  },
   comment: {
     // Select a provider and use the environment variables associated to it
     // https://vercel.com/docs/environment-variables

pages/_app.js

@@ -3,6 +3,7 @@ import '@/css/tailwind.css'
 import { ThemeProvider } from 'next-themes'
 import Head from 'next/head'
 
+import Analytics from '@/components/analytics'
 import LayoutWrapper from '@/components/LayoutWrapper'
 
 export default function App({ Component, pageProps }) {
@@ -11,6 +12,7 @@ export default function App({ Component, pageProps }) {
       <Head>
         <meta content="width=device-width, initial-scale=1" name="viewport" />
       </Head>
+      <Analytics />
       <LayoutWrapper>
         <Component {...pageProps} />
       </LayoutWrapper>