Only output GA on plyr.io domain

src/js/docs.js

@@ -12,4 +12,15 @@ plyr.setup({
 	captions: {
 		defaultActive: true
 	}
-});
+});
+
+// Google analytics 
+// For demo site (http://plyr.io) only
+if(document.domain === "plyr.io") {
+	(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-40881672-11", "auto");
+	ga("send", "pageview");
+}