gtm.sample.js

<script>
function beli() {
  dataLayer.push({
    'event': 'GTM.beli',
    'ecommerce': {
      'purchase': {
        'actionField': {
          'id': 'T12345',                         // Transaction ID. Required for purchases and refunds.
          'affiliation': 'Online Store',
          'revenue': '35.43',                     // Total transaction value (incl. tax and shipping)
          'tax':'4.90',
          'shipping': '5.99',
          'coupon': 'SUMMER_SALE'
        },
        'products': [{                            // List of productFieldObjects.
          'name': 'Triblend Android T-Shirt',     // Name or ID is required.
          'id': '12345',
          'price': '15.25',
          'brand': 'Google',
          'category': 'Apparel',
          'variant': 'Gray',
          'quantity': 1,
          'coupon': ''                            // Optional fields may be omitted or set to empty string.
         },
         {
          'name': 'Donut Friday Scented T-Shirt',
          'id': '67890',
          'price': '33.75',
          'brand': 'Google',
          'category': 'Apparel',
          'variant': 'Black',
          'quantity': 1
         }]
      }
    }
  });
}

beli();
</script>