Apple Pay on the Web Version 12 Release Notes

The version of Apple Pay available in macOS 12 and iOS 15.

Overview

New features include:

Added the properties total, additionalLineItems, and additionalShippingMethods to ApplePayModifier to support the W3C Payment Request API.
Added dateComponentsRange to ApplePayShippingMethod to provide estimated arrival dates for shipping methods.
Added supportsCouponCode and couponCode to ApplePayRequest to support the W3C Payment Request API.
Created ApplePayCouponCodeDetails to encapsulate the information within methodDetails from PaymentMethodChangeEvent.
Created ApplePayCouponCodeChangedEvent.
Added completeCouponCodeChange to ApplePaySession.
Created ApplePayCouponCodeUpdate.
Added shippingContactEditingMode to ApplePayRequest to support the W3C Payment Request API which allows you to define whether a user can edit a shipping address.
Added supportsCouponCode, couponCode, and shippingContactEditingMode to ApplePayPaymentRequest.