<!– Global site tag (gtag.js) - Google Analytics –> <script async src=“www.googletagmanager.com/gtag/js?id={{ site.google_analytics }}”></script> <script>

var host = window.location.hostname;
if (host != 'localhost') {
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', '{{ site.google_analytics }}');
}

</script>