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by kuschku 3172 days ago
I tried it in 2016 again, and under the alexa top million sites, I found basically all supported it, even if just with a redirect.

Mostly because nowadays every CDN, nginx, Apache2, IIS and HAProxy all support it by default.
2 comments
icebraining 3171 days ago
IIS might support it, but Microsoft doesn't (universally): social.technet.microsoft.com, live.com, bing.com, office.com, skype.com all fail to properly load or redirect. As does instagram.com and linkedin.com.
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chrismorgan 3171 days ago
It sounds like the situation has improved (if you consider it an improvement!) since then.

But did all of them function correctly? Assertions about the host are very common. Many things operate by domain whitelists, and so things like font loaders and analytics will commonly not work. Cross-origin resource loading will often break, if `*` is not used.

(Most of the things that I expect to break are unimportant, but there will still be a non-trivial number of important breakages.)

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