Re: [whatwg/fetch] Request.destination for `<link rel=prefetch>` (#658)

> Why does it need to be different from fetch() et al?

Presumably, a separate destination would enable SW code to know this fetch is speculative and destined for the next navigation. At the same time, I'm not aware of a concrete use-case for that.



> Maybe using initiator would be better if the purpose is just a unique CSP directive?

For CSP that would work as well.

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