gogle tag manager

app/views/layouts/application.html.haml

@@ -15,6 +15,15 @@
     %meta{:content => "Torsten Ruger", :name => "Author"}/
     %meta{ name: "google-site-verification" , content: "U86xRj-I-z08iE7t1EOXwZeiVLj9ItO3ydSpqrsdE3Y"}
 
+    / Google Tag Manager
+    :javascript
+      (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-THCLJTM');
+    / End Google Tag Manager
+
     = stylesheet_link_tag 'application', media: 'all'
     = javascript_include_tag 'application'
     = csrf_meta_tags
@@ -29,6 +38,10 @@
         fbq('init', fb_id + '750');
         fbq('track', 'PageView');
   %body
+    / Google Tag Manager (noscript)
+    %noscript
+      %iframe{:height => "0", :src => "https://www.googletagmanager.com/ns.html?id=GTM-THCLJTM", :style => "display:none;visibility:hidden", :width => "0"}
+
     .header
       = render 'layouts/navigation'
       = render 'layouts/messages'