28398 2015-04-03 08:42:54 +0000 <img> I want "image MIME types" to be defined 2016-08-11 08:01:50 +0000 1 1 1 Unclassified WHATWG HTML unspecified PC All RESOLVED FIXED P2 normal Unsorted 1 annevk ian dveditz ian mike contributor oldest_to_newest 119215 0 annevk 2015-04-03 08:42:54 +0000 We already have a list of JavaScript MIME types (see bug 28397 for getting a <dfn>). I think we should have a list for images as well. Perhaps for now we should allow user agents to extend the list, but requiring a minimum of e.g. image/png and image/gif seems non-controversial. Such a definition would help me define X-Content-Type-Options in Fetch. 127117 1 dveditz 2016-08-11 00:02:00 +0000 Why do we need a list for images? Anything with an image type (any subtype) is an image. It may be one a particular browser knows nothing about and will error out later trying to render, but it's an image. Javascript needs a list because there are multiple acceptable types mixed in with similar types that are definitely not javascript. 127120 2 annevk 2016-08-11 07:56:27 +0000 I guess that is fair. Images are rather special in that way that we managed to keep them all under the same type. 127121 3 annevk 2016-08-11 08:01:50 +0000 Thanks! https://github.com/whatwg/fetch/commit/b9ad2f5c16d5c565ce25b336d1e6f5dce0f7a066