The Product Discount Function API now supports cart line targeting

As of API Version 2024-07, the Product Discount Function API now supports a new target type: CartLineTarget, allowing for the application of discounts on specific cart lines, a use case that has historically only been possible with Shopify Scripts. This update can be used to link discounts to attributed cart lines such as upsell products, free gifts with purchase, or buyer customized products. You can learn more about the Product Discount Function API here.