26350 2014-07-16 05:35:10 +0000 If the list of available images is being used to de-dup requests from the same page, shouldn't this (step 2) happen before the fetch is complete? Or do I misunderstand its purpose? 2015-09-16 12:44:22 +0000 1 1 1 Unclassified WHATWG HTML unspecified Other other RESOLVED FIXED http://www.whatwg.org/specs/web-apps/current-work/#img-load P3 normal Unsorted 1 contributor zcorpan ian mike mnot oldest_to_newest 108981 0 contributor 2014-07-16 05:35:10 +0000 Specification: http://www.whatwg.org/specs/web-apps/current-work/multipage/edits.html Multipage: http://www.whatwg.org/C#img-load Complete: http://www.whatwg.org/c#img-load Referrer: http://www.whatwg.org/specs/web-apps/current-work/multipage/ Comment: If the list of available images is being used to de-dup requests from the same page, shouldn't this (step 2) happen before the fetch is complete? Or do I misunderstand its purpose? Posted from: 2001:44b8:418e:2700:b8f9:3dc4:ab0c:9512 User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.77.4 (KHTML, like Gecko) Version/7.0.5 Safari/537.77.4 109332 1 mnot 2014-07-28 04:21:53 +0000 This is regarding the "list of available images" BTW; it seems to operate as a cache of sorts (or at least a set function to avoid duplication), but I'm not completely sure. 109829 2 zcorpan 2014-08-04 13:49:00 +0000 If the page requests a new <img src> while a previous <img src> is still fetching the same URL, the spec invokes "fetch" again, but that is allowed to reuse the same fetch. So the list of available images is not used in that case. The list of available images is used when the image is completely available, to enable sync switching of images and to avoid re-downloading images in the same document that don't allow caching per HTTP. I could clarify this in a note if that would help. 109904 3 mnot 2014-08-04 23:45:59 +0000 Hi Simon, That would be helpful. Where is the text allowing reuse of a fetch-in-progress? I couldn't find it. Thanks 109936 4 zcorpan 2014-08-05 14:15:01 +0000 See http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#fetch step 11. I don't know where it is stated in the new Fetch spec though (HTML doesn't use the new Fetch yet). 109937 5 zcorpan 2014-08-05 14:29:11 +0000 https://github.com/ResponsiveImagesCG/picture-element/commit/f3f52af085dc8fed6b2bf2829db93c519769cb75 109980 6 mnot 2014-08-06 01:48:22 +0000 Thanks!