waitForUpdate is not defined

[domenic]

I can't tell who is supposed to hold this. Is it one per document? One per PaymentRequest?

[domenic]

This still remains mysterious. @adrianba @rsolomakhin any ideas what [[waitForUpdate]] is about?

[dlongley]

@domenic,

[[waitForUpdate]] is an internal slot in PaymentRequestUpdateEvent. I believe it gets flipped when someone calls updateWith from within an event handler so that:

1. An invalid state exception will be thrown if updateWith is called more than once.
2. As a guard that will prevent event handling from completing until unset again.

https://github.com/domenic/browser-payment-api/blob/85074dda44c64c088f87f961ac503783dc22114b/index.html#L1623-L1624

I believe its analog is the "wait to respond flag" used in the fetch spec's respondWith method.

Does that answer your question?

[domenic]

Yes, that's very helpful; thank you!