ashmckenzie / google_analytics

Google Analytics Javascript plugin

GoogleAnalytics

Google Analytics Javascript plugin implements the following methods which
generate the necessary GA javascript (minus the script tags): -

• ga_generate_js(‘YOUR-UA’)

  Produces new async style GA javascript: -

var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'YOUR-UA']);
_gaq.push(['_trackPageview']);

(function() {
  var ga = document.createElement('script');
  ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 
      'http://www') + '.google-analytics.com/ga.js';
  ga.setAttribute('async', 'true');
  document.documentElement.firstChild.appendChild(ga);
})();

• ga_generate_non_async_js(‘YOUR-UA’)

  Produces the non async style GA javascript: -

var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
try {
	var pageTracker = _gat._getTracker("YOUR-UA");
	pageTracker._trackPageview();
} catch(err) {}

Example

Inside you app/views/layouts/application.html.erb (using jQuery): -

<% javascript_tag :defer => 'defer' do %>
  $(document).ready(function() {
    <%= yield :script %>
    <%= ga_generate_js('UA-1234-5') %>
  });
<% end %>

Links

Async GA tracking – http://googlecode.blogspot.com/2009/12/google-analytics-launches-asynchronous.html

Copyright © 2009 [Ash McKenzie], released under the MIT license