> Deprecated: > Product subscription app extensions won't be supported as of December 3, 2025. You should migrate existing product subscription app extensions to [purchase options extensions](/docs/apps/build/purchase-options/purchase-options-extensions). Spinners are used to show merchants that your app is loading, or an action is being performed. Generally when a spinner is being used, the user shouldn't be able to interact.

| โœ… Do | ๐Ÿ›‘ Don't | | ---------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ | | Use Spinner to show that content is loading, or an action is being processed | Donโ€™t place Spinners for each loading element. Rather, Spinners should be at the top level of the section they apply to. | For more guidelines, refer to Polaris' [Spinner best practices](https://polaris.shopify.com/components/feedback-indicators/spinner#best-practices).