Start building product subscription app extensions

You can build a product subscription app extension using App Bridge Admin. This tutorial explains how to get started building a product subscription app extension.

Anchor to What you'll learnWhat you'll learn

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.

Anchor to RequirementsRequirements

• 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.

Anchor to Access scopesAccess scopes

Your app requires the following access scopes:

Anchor to SubscriptionsSubscriptions

• write_products
• read_customer_payment_methods
• read_own_subscription_contracts
• write_own_subscription_contracts

Anchor to Deferred purchase optionsDeferred purchase options

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

Anchor to Step 1: Generate a new extensionStep 1: Generate a new extension

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:

   Terminal

   Copy

   $

   $

   shopify app generate extension

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.

   Tip

   Vanilla JS is suitable for smaller projects that require a more straightforward API. React is suitable when you want an easy model for mapping state updates to UI updates. With Vanilla JS, you need to map state updates yourself. This process is similar to writing a vanilla application targeting the DOM, versus using react-dom.

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

Anchor to Step 2: Preview your extensionStep 2: Preview your 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:

   Terminal

   Copy

   $

   $

   shopify app dev
   
   

   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.

   Tip

   You can test using a specific product ID by passing it in using the --subscription-product-url flag. For example, --subscription-product-url="/products/12345", where 12345 is the product variant ID.

1. Press p to open the developer console.
2. In the developer console page, click on the preview link for the product subscription extension.

Anchor to Step 3: Check the extension script statusStep 3: Check the extension script status

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.

   Tip

   The Developer console automatically reloads the extension after you've saved the changes to your script.

Anchor to Step 4: Test your extension in the Shopify mobile appStep 4: Test your extension in the Shopify mobile app

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.

   

Anchor to Next stepsNext steps

• Learn about extension points.