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_app.js
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_app.js
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import { useEffect } from 'react'
import Script from 'next/script'
import { useRouter } from 'next/router'
import { GTM_ID, pageview } from '../lib/gtm'
function MyApp({ Component, pageProps }) {
const router = useRouter()
useEffect(() => {
router.events.on('routeChangeComplete', pageview)
return () => {
router.events.off('routeChangeComplete', pageview)
}
}, [router.events])
return (
<>
{/* Google Tag Manager - Global base code */}
<Script
id="gtag-base"
strategy="afterInteractive"
dangerouslySetInnerHTML={{
__html: `
(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer', '${GTM_ID}');
`,
}}
/>
<Component {...pageProps} />
</>
)
}
export default MyApp