Get started with product subscription app extensions

In this tutorial, you'll learn how to do the following tasks:

• Create a product subscription app extension.
• Run the extension locally and test it on a development store.

• You've created a Partner account.
• You've created a development store that uses generated test data.
• You've created an app that uses Shopify CLI 3.0 or higher.

Your app requires the following access scopes:

• write_products
• read_customer_payment_methods
• read_own_subscription_contracts
• write_own_subscription_contracts

• write_products
• read_all_orders
• read_customer_payment_methods
• read_purchase_options
• write_purchase_options
• read_payment_mandate
• write_payment_mandate

Use Shopify CLI to generate a new extension.

1. Navigate to your app directory.

2. To start creating the app extension, run the following command:

3. Select subscription UI as the type of extension.

4. Provide a name for your extension using either dash case or snake case.

5. Select a template for your extension. You can choose from Vanilla JS or React.

You should now have a new extension directory that includes the extension script at src/index.{file-extension}.

After your extension is created, you can work with it by building the app and starting a local development server.

Shopify CLI uses Cloudflare to create a tunnel that allows your app and extension to be accessed using a unique HTTPS URL.

1. Navigate to your app directory.

2. Either start or restart your server to build and preview your app:

   
   When you run the dev command, Shopify CLI builds and serves your app. It also walks you through multiple configuration steps. If you've already run dev for this app, then some of these steps are skipped.

   To learn about the processes that are executed when you run dev, refer to the list of Shopify CLI commands.

3. Press p to open the developer console.

4. In the developer console page, click on the preview link for the product subscription extension.

Now that you have your local extension running in your development store, you can check the app extension status and update the extension script.

1. Click the Developer Console navigation option.

   

   You should see the green Connected status badge and other data related to your extension.

   You should also see a Subscriptions card on the product page. You might need to scroll down to see it.

2. Update the extension script at either ./index.ts(x) or ./index.js and test it in your development store.

   For information on rendering extension points, refer to Create and manage a product subscription app extension.

You can test your extension in the Shopify mobile app using the Developer console.

1. Log in to your development store on the Shopify mobile app.

2. Click Developer Console, then click on the mobile icon to generate a QR code.

3. Use the camera on your mobile device or a QR code scanning app of your choice to scan the QR.

   The Shopify mobile app opens the product details view, and your extension is available in the Subscriptions card.

   

• Learn about extension points.