Re: [w3c/ServiceWorker] Top-level await integration for ServiceWorkers running modules (#1407)

On IRC Daniel explained to me that my agent-annotation suggestion works poorly architecturally for disabling top-level await, but allowing top-level await for dynamic imports. That's why https://github.com/whatwg/html/pull/4352 places the decision at module "creation".

And failing at parse time was apparently hard to get agreement on in TC39.

My remaining concern here is editorial, about inspecting [[PromiseState]] (see https://github.com/w3c/ServiceWorker/pull/1444#issuecomment-534103889), but that is something we can evolve over time and doesn't really affect the model so shouldn't be a blocking concern.

Hope that helps alleviate some of the confusion. It's at least a bit clearer for me again.

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