head.liquid

<!-- Global Site Tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id={{ integration['Property_ID'] }}"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', '{{ integration['Property_ID'] }}', { 'anonymize_ip': '{{ integration['anonymizeIp'] }}' });

  gtag('event', 'add_to_cart', {
    "items": [
      {% for item in cart.items %}
      {
        "id": '{{ item.id }}',
        "name": '{{ item.title }}',
        "brand": '{{ item.vendor }}',
        "category": '{{ item.category }}',
        "quantity": '{{ item.quantity }}',
        "price": '{{ item.price }}'
      },
      {% endfor %}
    ]
  });

  {% if template == 'thankyou' %}
    gtag('event', 'purchase', {
      'transaction_id': '{{ cart.order_code }}',
      'affiliation': '',
      {% if shop.shopify_compatibility? == true %}
        'value': '{{ cart.total_price | divided_by: 100.0 }}',
      {% else %}
        'value': '{{ cart.total_price }}',
      {% endif %}

      'shipping': '',
      'tax': '{{ cart.tax_amount }}',
      "items": [
         {% for item in cart.items %}
         {
         	'id': '{{ cart.order_code }}',
         	'name': '{{ item.product.title }}',
     			'sku': '{{ item.code }}',
     			'category': '{{ item.category }}',
     			{% if shop.shopify_compatibility? == true %}
        		'price': '{{ item.line_price | divided_by: 100.0 }}',
        	{% else %}
        		'price': '{{ item.line_price }}',
         	{% endif %}
        	'quantity': '{{ item.quantity }}'
         },
         {% endfor %}
       ]
    });
	{% endif%}
</script>