Google Analytics with VueRouter.js

router.afterEach((to, from) => {
       (function(i, s, o, g, r, a, m) {
           i['GoogleAnalyticsObject'] = r;
           i[r] = i[r] || function() {
               (i[r].q = i[r].q || []).push(arguments)
           }, i[r].l = 1 * new Date();
           a = s.createElement(o),
               m = s.getElementsByTagName(o)[0];
           a.async = 1;
           a.src = g;
           m.parentNode.insertBefore(a, m)
       })(window, document, 'script', 'https://www.google-analytics.com/analytics.js', 'ga');

       ga('create', 'UA-89431807-1', 'auto');

       ga('set', 'page', to.path);
       ga('send', 'pageview');
})