Rails 4 - Google analytics with Turbolinks

_footer.html.erb

<!-- app/views/layouts/_footer.html.erb -->

<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');

    ga('create', 'UA-XXXXXXX-1', 'YOUR DOMAIN');
    ga('send', 'pageview');
</script>

analytics.js.coffee

# app/assets/javascripts/analytics.js.coffee

if window.history?.pushState and window.history.replaceState
 document.addEventListener 'page:change', (event) =>
  # Google Analytics
  if window.ga != undefined
   ga('set', 'location', location.href.split('#')[0])
   ga('send', 'pageview')
  else if window._gaq != undefined
   _gaq.push(['_trackPageview'])
  else if window.pageTracker != undefined
   pageTracker._trackPageview();

application.html.erb

<!-- app/views/layouts/application.html.erb -->

...
<div class="container">
    <%= render 'layouts/messages' %>
    <%= yield %>
    <footer>
        <%= render 'layouts/footer' %>
    </footer>
</div>
...

👍