Re: [w3c/payment-request] Remove modifiers (#957)

I don't believe we can remove `modifiers`.

Google Pay currently uses the `modifiers` to pass transaction details, and to handle updates from the merchant if something changes (e.g. the user changes the shipping address). This is done via the `onpaymentmethodchange` callback, and the `updateWith` method on the `PaymentMethodChangeEvent` it passes.

You can see this via this test page https://output.jsbin.com/xotoxog (which is a copy of https://developers.google.com/pay/api/web/guides/resources/demos#dynamic-price-update-example). If one examines `pay.js` and looks for `modifiers`, you'll find the code using them. Dropping a breakpoint into the pretty-printed source and playing with the demo, I saw:

Initial clicking of button:
![image](https://user-images.githubusercontent.com/153264/117322847-60408f00-ae5c-11eb-94ec-2c7e19a97d81.png)

Updating the shipping method:
![image](https://user-images.githubusercontent.com/153264/117322913-6e8eab00-ae5c-11eb-93f0-ea08e6b39e4c.png)



-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/w3c/payment-request/pull/957#issuecomment-833605867