Re: [whatwg/fetch] Deferred fetching (PR #1647)

@noamr commented on this pull request.



> +   <a for=request>body</a>'s <a for=body>length</a>.
+  </ol>
+ </li>
+
+ <li><p><a for=list>For each</a> <a>deferred fetch record</a> <var>deferredRecord</var> in
+ <var>request</var>'s <a for=request>client</a>'s <a for=fetch>fetch group</a>'s
+ <a for="fetch group">deferred fetch records</a>: if <var>deferredRecord</var>'s
+ <a for="deferred fetch record">request</a>'s <a for=request>body</a> is not null and
+ <var>deferredRecord</var>'s <a for="deferred fetch record">request</a>'s <a for=request>URL</a>'s
+ <a for=url>origin</a> is <a>same origin</a> with <var>request</var>'s <a for=request>URL</a>'s
+ <a for=url>origin</a>, then increment <var>totalScheduledDeferredBytesForOrigin</var> by
+ <var>deferredRecord</var>'s <a for="deferred fetch record">request</a>'s <a for=request>body</a>'s
+ <a for=body>length</a>.
+
+ <li><p>If <var>totalScheduledDeferredBytesForOrigin</var> is greater than 64 kilobytes, then
+ throw a {{QuotaExceededError}}.

Looking at the PR I think the current wording is sufficient. When we terminate, we first kill ongoing fetches that are not `keepalive`, and then we start the deferred fetches. After this point, no one would terminate the deferred fetch.

For background-timeout fetches, the UA can dispatch them at any time to make sure they don't surpass the `keepalive` quota.


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