> For the complete documentation index, see [llms.txt](https://support.functionjunctionapp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.functionjunctionapp.com/getting-started/shopify-scripts-are-ending-migrate-to-function-junction.md).

# Shopify Scripts are ending: Migrate to Function Junction

**Shopify Scripts is being retired on June 30, 2026.**

If you're a Shopify Plus merchant using Shopify Scripts to customize discounts, shipping, or payment logic, you'll need to migrate to Function Junction to maintain functionality.

**Function Junction** (also known as Shopify Functions) offers a more flexible and scalable way to customize your store’s checkout experience.

### **What is Function Junction?**

Function Junction is based on the [Functions API](https://shopify.dev/docs/api/functions) and makes it easy to migrate from Shopify Scripts. Instead of manually pasting Ruby scripts, you can install functions as part of an app. The app uses Shopify’s **WebAssembly platform**, which means:\
\
✔ **Faster performance** (under 5ms execution time)\
✔ **No timeout or CPU memory issues**\
✔ **Scalability for big sales events**

***

### **Migration deadline**

**The deadline to migrate away from Scripts is June 30, 2026.**\
\
After this date, Shopify Scripts will be retired. To avoid interruption, you need to migrate to Function Junction before then to avoid disruptions.

***

### **Scripts to migrate**

Shopify provides a **Scripts Customizations Report** that shows all your active scripts. To access it, do the following:

1. From your Shopify Admin, go to **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.

***

### **4. Function Junction: Prebuilt apps vs. custom development**

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

**1.** **Use prebuilt Function Junction templates**

* Function Junction has over 20 pre-built templates to help make the migration process easier.
* Install the app and configure it. There is no coding required!

**2.** **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.

***

### **What’s changing?**

Use this quick comparison table to understand what’s changing and how to plan your transition.

| 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         |

***

### **Current state: How Function Junction works with Shopify Scripts**

Until June 30, 2026, you can run Shopify Scripts and Function Junction together.&#x20;

However, they interact in specific ways:

* &#x20;**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.

***

### **Next steps: Migrate to Function Junction**

Ready to migrate? Do the following:

1. Check your Shopify Scripts Customizations Report to see what needs to be replaced.
2. &#x20;Decide if you’ll use a Function Junction app or build a custom Function.
3. Test your Function Junction setup before deactivating old scripts.
4. Disable Shopify Scripts once everything is running smoothly.