Re: [whatwg/fetch] Return a "controller" instance from fetch (#1329)

@noamr commented on this pull request.



> @@ -3756,6 +3804,9 @@ the request.
  <a for="fetch params">cross-origin isolated capability</a> is
  <var>crossOriginIsolatedCapability</var>.
 
+ <li><p>If <var>processFetchStart</var> is not null, invoke <var>processFetchStart</var> with
+ <var>fetchParams</var>'s <a for="fetch params">controller</a>.

The problem was that HTTP fetch is synchronous and returns a response. So changing SW fetch to be asynchronous would require a big refactor and I try to be consistent. Unless there is some await-style language I can use?

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