Intent to Implement and Ship: Allow PaymentRequest.show() to take optional detailsPromise

[Rouslan Solomakhin]

Contact emails rou...@chromium.org Spec https://github.com/w3c/payment-request/pull/672/files

Motivation Some users may not know the total or line items at the time of attempting to open the payment sheet with show() -- there may be asynchronous server-based logic yet to be resolved.

Summary This feature is a way to signal that the browser should show a spinner or equivalent and wait to allow end user interaction until an update. Interoperability risk Firefox: In development Edge: No public signals Safari: Shipped Web developers: Positive Compatibility risk Passing a detailsPromise into a show() method of a browser that does not support taking this promise may result in an outdated total and lines items being shown in the payment sheet.  Ongoing technical constraints None Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)? Yes or no. No. There's no PaymentRequest on WebView. OWP launch tracking bug https://crbug.com/817073 Link to entry on the Chrome Platform Status https://www.chromestatus.com/feature/6092351889997824 Requesting approval to ship? Yes

[TAMURA, Kent]

LGTM1

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TAMURA Kent
Software Engineer, Google

[Rick Byers]

LGTM2 (sorry for the delay, missed this while travelling).

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[Chris Harrelson]

LGTM3

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