Re: [whatwg/fetch] Elaborate on obtaining a connection (#1245)

@MattMenke2 commented on this pull request.



> @@ -2204,6 +2204,39 @@ unset or <a for=request>keepalive</a> is false, <a lt=terminated for=fetch>termi
 <a for="fetch group">fetch record</a>'s <a for="fetch record">fetch</a>.
 
 
+<h3 id=resolving-domains>Resolving domains</h3>
+
+<p>To <dfn>resolve a domain</dfn>, given a <a for=/>domain</a> <var>domain</var> and a
+<a for=/>network partition key</a> <var>key</var>, perform an <a>implementation-defined</a>
+operation to turn <var>domain</var> into a <a for=/>set</a> of one or more
+<a for=/>IP addresses</a>. If this operation succeeds, return the <a for=/>set</a> of
+<a for=/>IP addresses</a>. If it fails, return failure. The results of this operation may be cached.
+If they are cached, <var>key</var> must be used as part of the cache key.

The style tends to be purely descriptive of what browsers do, with no additional detail (e.g., nowhere is it mentioned why network partition keys exist, or what the "essence" of a MIME type is intended for, merely how they are calculated and used).

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