[csswg-drafts] Style sheet loading should do ok status check (#5864)

annevk has just created a new issue for https://github.com/w3c/csswg-drafts:

== Style sheet loading should do ok status check ==
While working on https://github.com/annevk/orb I discovered that Chrome and Safari check if a style sheet has an [ok status](https://fetch.spec.whatwg.org/#ok-status) and otherwise ignore it. This does not appear to be defined in CSSOM.

(I don't think this poses a security problem as `<script>` exposes the same information and `<object>` does too.)

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/5864 using your GitHub account


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