Shopify Functions: tilpas checkout uden apps

Shopify Functions are pieces of code that run in Shopify's backend during checkout, letting you customize discounts, shipping, and validation without a third-party app. They execute server-side in milliseconds and are the successor to the legacy Shopify Scripts.

Shopify is an ecommerce platform that lets brands create and run an online store with product management, payments, checkout, and order handling. Shopify Functions extend that core by making the checkout logic itself programmable.

The most common use cases are discount logic (volume discounts, customer-specific pricing, combination rules), shipping customization (hiding, renaming, or sorting delivery methods), and validation that can block a purchase under specific conditions such as minimum order value or unit quantity.

Often, yes. Many brands run several overlapping apps for discounts and shipping that can be consolidated into a single custom Function. This removes subscription fees, reduces app conflicts, and gives you full control over edge cases.

Functions are typically developed as part of an app and deployed via Shopify's CLI, so development is required. App-based no-code tools exist for simple cases, but business-critical and complex logic is best built as a tailored, versioned solution.