Google Analytics 4

app/views/layouts/application.html.slim

@@ -12,14 +12,12 @@ html
     = stylesheet_pack_tag 'application', media: 'all'
     = javascript_pack_tag 'application'
     - if ENV['GOOGLE_ANALYTICS_ID']
+      script async=true src='https://www.googletagmanager.com/gtag/js?id=#{ENV['GOOGLE_ANALYTICS_ID']}'
       javascript:
-        (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', '#{ENV['GOOGLE_ANALYTICS_ID']}', 'auto');
-        ga('send', 'pageview');
+        window.dataLayer = window.dataLayer || [];
+        function gtag(){dataLayer.push(arguments);}
+        gtag('js', new Date());
+        gtag('config', '#{ENV['GOOGLE_ANALYTICS_ID']}');
 
   body
     == yield