This Variable (Web) for Google Analytics 4 (GA4) returns GA4 Ecommerce Items and other standard ecommerce parameters as Data Layer Variable Version 1. This ensures that Google Tag Manager will only access the most recent push into the Data Layer.
If you haven't implemented clearing of the ecommerce object, this Variable helps you overcome issues that can cause. If you have implemented object clearing you can also use this variable as extra "safety" in case the object clearing implementation breaks.
In addition, you can also use this Variable to remove null and empty values from Items. null values in Items can cause null being sent as a string, which can cause data issues.
This Template is available in the Google Tag Manager Template Gallery.
Select the parameter you want to as output. The Variable is reading data from the Data Layer Key Part ecommerce.items if you select items, but as Variable Version 1.
If you select items, you also have the option to remove null and empty values if that is an issue with your implementation.
The following standard ecommerce parameters are supported:
| Parameter Name | Data Layer |
|---|---|
| items | ecommerce.items |
| item_list_id | ecommerce.item_list_id |
| item_list_name | ecommerce.item_list_name |
| creative_name | ecommerce.creative_name |
| creative_slot | ecommerce.creative_slot |
| promotion_id | ecommerce.promotion_id |
| promotion_name | ecommerce.promotion_name |
| location_id | ecommerce.location_id |
| payment_type | ecommerce.payment_type |
| shipping_tier | ecommerce.shipping_tier |
| transaction_id | ecommerce.transaction_id |
| affiliation | ecommerce.affiliation |
| coupon | ecommerce.coupon |
| value | ecommerce.value |
| shipping | ecommerce.shipping |
| tax | ecommerce.tax |
Just install the Template, and add the Variable to your GA4 Ecommerce Tags as shown in the image below. Variable name used in the Tag example is {{ecom - items - DLV - V1}}).
The image below is from Google Tag Manager Preview Pane showing the result from a add_to_cart Event. As we can see the Variable from this Template (ecom - items - DLV - V1) is returning the item added to cart. The Data Layer Variable Version 2 (ecom - items- DLV - v2) contains the item added to cart + a item from a previous Event which is not correct.
