Read and write cookies with the POS App SDK

POS App SDK is deprecated. Use Shopify App Bridge instead.

To read or write cookies, an app that's embedded in Shopify POS needs to be in a first-party context, which means that it has no parent. When your app calls ShopifyPOS.init, it is pulled into a third-party context because Shopify is the parent of your view. In this third-party context, your app can't read or write cookies.

After the first time that your app calls ShopifyPOS.init, your app might be automatically pulled into a third-party context on consecutive views. To read or write cookies, you need to temporarily escape that third-party context by using ShopifyPOS.remoteRedirect.

You can use JavaScript to check your app's context, and then call ShopifyPOS.remoteRedirect (if necessary):

if (window.top == window.self) {
  // First-party context

  // Set or read cookies

  // Initialize ShopifyPOS when you're done
  ShopifyPOS.init({
    apiKey: apiKey,
    shopOrigin: shopOrigin
  });
} else {
  // Third-party context

  // Set or read cookies at your first-party view, and then redirect back into the first-party context from there
  ShopifyPOS.remoteRedirect('https://app-domain.com/set-cookies');
}