[Webkit-unassigned] [Bug 197010] Safari doesn't preconnect to origin when using rel="preconnect dns-prefetch"

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=197010

--- Comment #7 from Andy Davies <ad at andydavies.net> ---
Two new test pages attached where the link element has multiple rel attributes

<link rel="dns-prefetch" rel="preconnect" href="https://www.wikipedia.org/">
<link rel="preconnect" rel="dns-prefetch" href="https://www.wikipedia.org/">

In the case where the preconnect rel attribute comes first then Safari preconnects - get message in the console to indicate it, and the WebPageTest waterfall is missing the connection setup (which is normal for Safari when it preconnects)

dns-prefetch then preconnect - https://www.webpagetest.org/result/190418_WQ_58c2423b8532c6e12e73677b22a2cffe/

preconnect then dns-prefetch https://www.webpagetest.org/result/190418_15_a09ce74e9616ee5555cc5faaba33cb3c/

For comparison Chrome preconnects in both test cases (preconnect in Firefox appears broken ATM)

https://www.webpagetest.org/result/190418_8B_09a0743914357f1ada40740a43065085/
https://www.webpagetest.org/result/190418_XT_62b65003d8ea2a6db70a110aaa84e51f/

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