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Specification: http://www.whatwg.org/specs/web-apps/current-work/multipage/offline.html Multipage: http://www.whatwg.org/C#appcache Complete: http://www.whatwg.org/c#appcache Referrer: http://www.whatwg.org/specs/web-apps/current-work/multipage/ Comment: The fast and prefer-online states of the cache mode flag are not documented. Posted from: 2620:0:1002:1005:be30:5bff:fedb:e0fc User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36
Does the text in the section "Supporting offline caching for legacy applications" answer this request?
That section is non-normative, so it can't specify what the cache modes mean, only explain a specification that's present elsewhere. The paragraph starting with "This causes the application cache to only be used for master entries when the user is offline..." does explain what the prefer-online state is intended to do.
Ok, I'm going to assume that means you're satisfied. If you're not, please reopen. Thanks!