How can a Shopify app create an accessibility regression?

Shopify apps inject customer-facing controls, dialogs, reviews, subscriptions, and upsells into the storefront. If that markup lacks names, keyboard support, focus management, or sufficient contrast, the live store fails even when the theme is sound. Test every app state before launch and monitor its rendered output because vendors can update app code without a theme release.

High-risk app surfaces

Review widgets, subscription selectors, loyalty popups, size charts, chat launchers, and upsell drawers are common interactive surfaces. Test the trigger, open state, controls, close behavior, and any errors with both keyboard and assistive technology.

How to manage vendor fixes

Capture the URL, selector, behavior, and app attribution before contacting the vendor. Keep the issue open until the live rescan passes. If a vendor cannot repair a blocker, replace or disable the affected component.