app routing

_app.tsx

    const router = useRouter();

    useEffect(() => {
        const handleRouteChange = (url: URL) => {
            gtag.pageview(url);
        };
        router.events.on(
            'routeChangeComplete',
            handleRouteChange
        );
        return () => {
            router.events.off(
                'routeChangeComplete',
                handleRouteChange
            );
        };
    }, [router.events]);