Re: [w3c/payment-request] Change of approach for gesture to invoke Payment Sheet (#834)

Thanks @marcoscaceres. I agree that the full details of my proposal are beyond the spec, but I think there are a few items in the spec that could do with amending to allow this sort of approach. For example the spec current states;

> It is not possible to show multiple PaymentRequests at the same time within one user agent. If a PaymentRequest is already showing, calling show() —from any Web site— will return a promise rejected with an "AbortError" DOMException.

With the approach I outline, I don't think the restriction in the specification needs to apply. I think this restriction was inserted on the basis that the interactions after .show() was expected to be modal.

Furthermore I think some of other wording implies a modal approach, for example

> ....when the user accepts the payment request.

I would suggest this could read 'if the user were to authorize a payment request"

If we can remove the expectations around modality from the spec, then I think it better represents the possibilities.


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