Shopify Polaris
Polaris is Shopify's open-source design system and React component library used to build embedded admin apps. Polaris components ship WCAG 2.1 AA-compliant out of the box.
Detailed explanation
Polaris provides 60+ React components — buttons, modals, data tables, form fields — pre-built with the keyboard, ARIA, and focus management patterns required for WCAG conformance. Apps that use Polaris correctly inherit accessibility for free; apps that subclass or override Polaris components can break it.
Built for Shopify (BFS) accessibility criteria reference Polaris by name as the recommended path. Apps that ship custom UI must demonstrate equivalent accessibility — meaning a Polaris-built app passes faster than a custom-component app.
How this applies to Shopify stores
AccessComply's embedded admin app is built entirely on Polaris v12 + App Bridge v4. Every Polaris component is keyboard-operable, screen-reader-labelled, and focus-managed by default — which is the BFS shortcut path.
Primary source: polaris.shopify.com