title: How to track Google Plus +1 (plusone) clicks on Google Analytics with analytics.js
body: <p>I am trying to get information about Google+ +1 clicks into Google Analytics.  This apparently functions out of the box if you use the "classic" tracking mechanism - using ga.js.  However we are using the newer "analytics.js" option.  The developer page about social interaction for analytics here: <a href="https://developers.google.com/analytics/devguides/collection/analyticsjs/social-interactions" rel="nofollow">https://developers.google.com/analytics/devguides/collection/analyticsjs/social-interactions</a> says the following:</p>
  
  <blockquote>
    <p>Currently, the analytics.js library does not automatically measure
    Google+ social interactions (unlike, ga.js social interaction tracking
    which does). To measure Google+ interactions, you must explicitly
    implement social interaction.</p>
  </blockquote>
  
  <p>So, how do you "explicitly implement social interaction" for Google+?</p>
  
  <p>I have managed to gather analytics information for Facebook and Twitter buttons using callbacks, and expect there will be a similar mechanism for Google+ but I am completely astonished how little information there is online about how to do this.  I have spent about 2 hours Googling with next to no leads.</p>
  
  <p>Thanks for any pointers.</p>