Google Analytics that respects Do-Not-Track header

google-analytics.html

<script>                                                                        
  var dnt = navigator.doNotTrack || window.doNotTrack || navigator.msDoNotTrack;
  if (dnt != "1" && dnt != "yes") {
    (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-XXXXXXXX-X', 'auto');                                      
    ga('send', 'pageview');                                                     
  } else {                                                                      
    console.debug("Respecting Do-Not-Track, not loading analytics. See https://www.paulfurley.com/google-analytics-dnt/");         
  }                                                                             
</script>