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setup Google Analytics for next.js app

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Prefer next/script component when using the inline script for Google Analytics.

gtag.js

add following code after <Head>



<Script
        src="https://www.googletagmanager.com/gtag/js?id=GA_MEASUREMENT_ID"
        strategy="afterInteractive"
      />
      <Script id="google-analytics" strategy="afterInteractive">
        {`
          window.dataLayer = window.dataLayer || [];
          function gtag(){window.dataLayer.push(arguments);}
          gtag('js', new Date());

          gtag('config', 'GA_MEASUREMENT_ID');
        `}
      </Script>
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