以下是將 Google Analytics 4 添加到基於 Next.js 的網站的步驟。
首先,創建一個 Google Analytics 屬性,並將屬性 ID 保存在 NEXT_PUBLIC_GOOGLE_ANALYTICS
環境變量中。
然後,在 pages/_app.js
文件中添加一個 useEffect()
調用,其代碼如下:
import '/public/style.css'
function MyApp({ Component, pageProps }) {
return <Component {...pageProps} />
}
修改它為:
import { useEffect } from 'react'
import { useRouter } from 'next/router'
import 'tailwindcss/tailwind.css'
import '/public/style.css'
function MyApp({ Component, pageProps }) {
const router = useRouter()
useEffect(() => {
const handleRouteChange = url => {
window.gtag('config', process.env.NEXT_PUBLIC_GOOGLE_ANALYTICS, {
page_path: url,
})
}
router.events.on('routeChangeComplete', handleRouteChange)
return () => {
router.events.off('routeChangeComplete', handleRouteChange)
}
}, [router.events])
return <Component {...pageProps} />
}
export default MyApp
最後,添加一個 pages/_document.js
文件,創建一個 Next.js 自定義文檔,並注入 Google Analytics 腳本,代碼如下:
import Document, { Html, Head, Main, NextScript } from 'next/document'
export default class MyDocument extends Document {
render() {
return (
<Html>
<Head>
<script
async
src={`https://www.googletagmanager.com/gtag/js?id=${process.env.NEXT_PUBLIC_GOOGLE_ANALYTICS}`}
/>
<script
dangerouslySetInnerHTML={{
__html: `
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', '${process.env.NEXT_PUBLIC_GOOGLE_ANALYTICS}', {
page_path: window.location.pathname,
});
`,
}}
/>
</Head>
<body>
<Main />
<NextScript />
</body>
</Html>
)
}
}
注意:解決方案來自 Marie Starck 在 https://mariestarck.com/add-google-analytics-to-your-next-js-application-in-5-easy-steps/ 上的文章。