Re: [w3c/ServiceWorker] Improve handling of extend lifetime promises (#1049)

jungkees commented on this pull request.



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+          Note: If no lifetime extension promise has been added up to this point (i.e., at the end of the task that called the event handlers), the [=ExtendableEvent/extensions allowed flag=] is immediately unset. Calling {{ExtendableEvent/waitUntil()}} in subsequent asynchronous tasks will throw.

I was between leaving the flag as a variable helping the understanding of the control flows and removing it as the cleanup of unnecessary variables. I think the latter wins, so removed it.

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