Constructed StyleSheets need to be adopted by `DocumentOrShadowRoots` as noted in the [spec](https://bugzilla.mozilla.org/show_bug.cgi?id=1607268). This bug aims to implement and test the functionality of this attribute under a preference.
Bug 1608488 Comment 0 Edit History
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Constructed StyleSheets need to be adopted by `DocumentOrShadowRoot`s as noted in the [spec](https://bugzilla.mozilla.org/show_bug.cgi?id=1607268). This bug aims to add the `adoptedStyleSheets` attribute to the `DocumentOrShadowRoot` WebIDL interface.