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Checkout UI Extensions: Replace Script Tags With Polaris Targets

1 min read108 readsBy Super Admin

Checkout UI Extensions: Replace Script Tags With Polaris Targets

If your store still depends on checkout script tags or a forked checkout.liquid, you are on borrowed time. Shopify's supported path is Checkout UI extensions: custom UI and logic at defined steps, rendered with Polaris web components.

What you can add

Extensions can show personalized messages during cart review, surface custom payment context, or drop a survey on the thank-you page. You pick a target, use the target API, and render Shopify's web components.

Plus vs non-Plus

Checkout UI extensions for the information, shipping, and payment steps are available only on Shopify Plus. Thank-you and order-status customizations have a wider surface.

shopify app generate extension --template checkout_ui

Source: Checkout UI extensions (2026-07).

Tagged

  • #Checkout
  • #UI Extensions
  • #Shopify Plus

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