Re: [whatwg/dom] AbortController, AbortSignal, and garbage collection (#920)

> But then again, this might be a very specific use case that isn't very useful for the whole of the web platform.

I had a use-case like this a couple of days ago fwiw. It was on squoosh.app, where there's a single controller that does overall things like decoding the input image, but then there are two other controllers for processing and encoding each side. Changing the encoding settings on one side only aborts the operations on that side, but dropping in a new image aborts main image decoding, and processing of both sides.

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