Shopify Scripts Are Ending: How to Migrate Shopify Scripts to Function Junction

If you're a Shopify Plus merchant, you’ve probably relied on Shopify Scripts to customize discounts, shipping, and payment rules. But big changes are coming—Shopify Scripts will be retired on August 28, 2025.

The good news? Function Junction (aka Shopify Functions) is here to replace them! Here’s what you need to know:

1. What Is Function Junction?

Function Junction is a new Shopify app based on Functions that makes it easy to migrate off of scripts. Instead of manually pasting Ruby scripts, you’ll install Functions as part of an app. These apps run on Shopify’s WebAssembly platform, which means: ✔ Faster performance (under 5ms execution time) ✔ No timeout or CPU memory issues ✔ Scalability for big sales events

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2. When Do You Need to Migrate?

📅 Deadline: August 28, 2025 After this date, Shopify Scripts will no longer work. You’ll need to transition to Function Junction before then to avoid disruptions.

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3. How to Find Out Which Scripts You Need to Migrate

Shopify provides a Scripts Customizations Report that shows all your active scripts. To access it:

1. Go to Shopify Admin > Settings > Apps and Sales Channels.

2. Click Script Editor.

3. In the banner, select "Replace Shopify Scripts."

4. Review your report for customizations in:

   • Product Discounts

   • Shipping Rules

   • Payment Gateways

You can also export this report as a CSV for easy reference.

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4. Function Junction: Prebuilt Apps vs. Custom Development

Once you have your list of scripts, you have two migration options:

🔹 Use Prebuilt Function Junction templates

• Function Junction has over 20 pre-built templates to help make the migration process more seamless.

• Simply install the app and configure it—no coding required!

🔹 Build Your Own Custom Function Junction Solution

• If no app meets your needs, developers can create custom Functions.

• Unlike Scripts, Functions must be deployed via the Shopify Partner Dashboard.

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5. Function Junction vs. Shopify Scripts: What’s Changing?

Still wondering how Function Junction compares to Shopify Scripts? Here’s a quick breakdown:

Feature	Shopify Scripts	Function Junction
Execution Time	Slower, Ruby-based	Faster, WebAssembly-based
Customization	Manual Ruby scripts	Apps & APIs
Performance	Can have timeouts	Runs in <5ms
Scalability	Limited for flash sales	Supports large-scale sales
Deployment	Copy-paste scripts	Installed via apps

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6. How Function Junction Works with Shopify Scripts (For Now)

Until August 28, 2025, you can run Shopify Scripts and Function Junction together. However, they interact in specific ways:

✅ Line Item Scripts run before Function Junction, meaning they don’t see discounts applied by Functions. ✅ Shipping Scripts run after Function Junction, but can only move or hide shipping options—not rename them. ✅ Payment Scripts run after Function Junction, and can’t modify renamed payment methods.

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7. Next Steps: Making the Move to Function Junction

Ready to migrate? Follow these steps:

1️⃣ Check your Shopify Scripts Customizations Report to see what needs to be replaced. 2️⃣ Decide if you’ll use a Function Junction app or build a custom Function. 3️⃣ Test your Function Junction setup before deactivating old scripts. 4️⃣ Disable Shopify Scripts once everything is running smoothly.

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Final Thoughts

Shopify Scripts are on their way out, but Function Junction brings better performance, reliability, and scalability. Start your migration today so your store is ready before the August 28, 2025 deadline! 🚀

Got questions about the transition? Let us know!