Helixian | Shopify Checkout Extensibility Upgrade

Upgrade to Checkout Extensibility

Shopify Updates

What is Checkout Extensibility?

Shopify deprecated checkout.liquid modifications and Shopify Scripts in favor of extensibility APIs. The upgrade path enables safer and more scalable checkout customization for modern storefronts.

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Checkout.liquid Replacement

Checkout UI Extensions

With checkout.liquid being deprecated, Shopify has released what's known as Checkout UI Extensions. App developers can now create custom UI components or blocks that can be inserted into the checkout flow. Merchants who currently have customizations to their checkout.liquid file will have two ways to migrate these customizations to Checkout UI Extensions.

1 Install an app from the marketplace
App developers are currently working on adding Checkout UI Extension functionality to their apps and will continue to release these updates in the coming months. If you can't find an app in the marketplace that meets your needs, you'll need to create a custom app.
2 Create a Shopify Custom App
Shopify's Checkout Extensibility APIs are only available to public and custom apps. Compared to checkout.liquid modifications, it is a much more technical process to create a custom app as now you'll need to maintain at least a web server and likely a database.

Shopify Scripts Replacement

Shopify Functions

Shopify Scripts allows merchants to add pricing customization logic to their site by writing some Ruby code. With it's deprecation, Shopify has released Shopify Functions. Shopify Functions is an API that allows developers to make the same kind of pricing adjustments that were possible with Shopify Scripts and more.

Similar to the rest of Checkout Extensibility's API's, Shopify Functions are only available to public and custom apps. Many merchants have more complex pricing logic and the migration for each brand will be unique given their current setup. It's much more likely that merchants will struggle to find a public app that meets all of their needs, requiring them to build a custom app.

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Custom App Development

Helixian is a Shopify Partner engineering agency focused on custom app development. We combine AI-assisted implementation with senior developer validation to ship robust integrations and differentiated checkout experiences.

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