#1: Update Google Analytics script

Author: adielcristo

theme/main.html

@@ -20,21 +20,14 @@
     {%- endfor %}
 
     {% if config.google_analytics %}
+    <!-- Global site tag (gtag.js) - Google Analytics -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id={{ config.google_analytics[0] }}"></script>
     <script>
-    (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', '//www.google-analytics.com/analytics.js', 'ga');
+      window.dataLayer = window.dataLayer || [];
+      function gtag(){dataLayer.push(arguments);}
+      gtag('js', new Date());
 
-    ga('create', '{{ config.google_analytics[0] }}', '{{ config.google_analytics[1] }}');
-    ga('send', 'pageview');
+      gtag('config', '{{ config.google_analytics[0] }}');
     </script>
     {% endif %}
 </head>