Migrating from Shopify Scripts to Shopify Functions

Overview

Shopify Scripts have been fully deprecated: editing/publishing Scripts stopped on April 15, 2026, and all Shopify Scripts stopped executing on June 30, 2026. If any of your UpsellPlus discount automations still rely on Script Editor, they are no longer applying at checkout. Migrate to Shopify Functions now — Functions are modern, require no coding, and work directly within UpsellPlus.

What You Need to Know

Shopify Functions replace Scripts with:

• No custom code required--configure entirely in UpsellPlus
• Better performance and reliability
• Native checkout integration
• Support for shipping discounts (Scripts limited)
• Future updates and improvements

Migration Steps

1. Find Scripts-Based Offers

• Go to UpsellPlus -> Offers
• Click Edit on each offer
• Check Discount Settings for "Shopify Scripts" indication

2. Document Current Settings

• Note discount type (percentage, fixed amount, BOGO)
• Record discount value
• Note scope (cart, product, or collection)
• Any conditional Smart Rules

3. Switch to Functions

• Click Edit on the offer
• In Discount Settings, select "Use Shopify Functions"
• Re-enter discount type, value, and scope
• Configure any Smart Rules
• Click Save

UpsellPlus automatically creates and registers the Function with your store.

4. Remove Old Scripts

• In Shopify admin, go to Settings -> Apps and sales channels -> Script Editor
• Find each UpsellPlus Script
• Remove or deactivate it if still present
• This prevents any conflicts with your new Functions-based discounts

Testing Your Discounts

1. Add the upsell product to your cart
2. Proceed to checkout and verify the discount appears
3. Calculate: expected discount matches actual discount
4. Test with different products eligible for the offer
5. Check Shopify admin Order -> Discounts to confirm

Troubleshooting

Need Help?

• Email support@upsellplus.com with your store URL and issue
• Click ? in UpsellPlus for in-app help

Updated on: 01/09/2026