28616 2015-05-07 05:45:24 +0000 Feature testing for <link rel> 2016-04-27 20:54:04 +0000 1 1 1 Unclassified HTML WG HTML5 spec unspecified PC All RESOLVED WONTFIX whatwg-resolved P2 normal --- 28796 1 igrigorik dave.null arronei d mike public-html-admin public-html-wg-issue-tracking public-html-bugzilla oldest_to_newest 120218 0 igrigorik 2015-05-07 05:45:24 +0000 We need a way to test support for various <link rel> features - e.g. prerender, prefetch, preload, preconnect. Related threads: - https://github.com/w3c/preload/issues/7 - https://lists.w3.org/Archives/Public/public-whatwg-archive/2015Apr/0000.html Simon's proposal from the mailing list: > For <link rel>, we could solve the feature-testing problem by normalizing the case for supported keywords but not unsupported keywords, so you can check with .rel or .relList: > > function preloadSupported() { > var link = document.createElement('link'); > link.rel = 'PRELOAD'; > return link.rel == 'preload'; > } 121165 1 mike 2015-06-17 03:52:29 +0000 To be clear, based on reading the threads linked to in the description for this bug, the bug is not about testing but is instead about the HTML spec defining a new feature for the platform that would facilitate this kind of testing. 126221 2 arronei 2016-04-27 20:54:04 +0000 HTML5.1 Bugzilla Bug Triage: Incubation needed This bug constitutes a request for a new feature of HTML. The current guidelines [1], rather than track such requests as bugs or issues, please create a proposal outlining the desired behavior, or at least a sketch of what is wanted (much of which is probably contained in this bug), and start the discussion/proposal in the WICG [2]. As your idea gains interest and momentum, it may be brought back into HTML through the Intent to Migrate process [3]. [1] https://github.com/w3c/html#contributing-to-this-repository [2] https://www.w3.org/community/wicg/ [3] https://wicg.github.io/admin/intent-to-migrate.html