#shopify-functions

Shopify's native Buy X Get Y is widely reported to cap eligible products at 100 and applies once per order. Here is how to run store-wide, repeating 3-for-2.

Shopify Scripts stop executing June 30, 2026. Here is what breaks, why migrated rules fail silently, and how to move discount logic to Functions without code.

For years Shopify applied only one product discount per line item. A 2026 platform change lifts that limit with a two-way tag match. Here is what changed, who qualifies, and how to combine product discounts correctly.

Shopify only applies your single highest discount by default. Here is how to stack discounts across product, order, and shipping classes so totals match at checkout.