{% if jekyll.environment == "production" %}
  {% if site.analytics_id %}
    <script async src="https://www.googletagmanager.com/gtag/js?id={{ site.analytics_id }}"></script>
    <script>
      window.dataLayer = window.dataLayer || [];
      function gtag(){dataLayer.push(arguments);}
      gtag('js', new Date());

      gtag('config', '{{ site.analytics_id }}');
    </script>
  {% endif %}
{% endif %}