NEW307878
scoped custom customizes when upgrade called on non-matching registry. 
https://bugs.webkit.org/show_bug.cgi?id=307878
Summary scoped custom customizes when upgrade called on non-matching registry.
Steve Orvell
Reported 2026-02-13 18:08:41 PST
Created attachment 478345 [details] Unexpected custom element customization See the attached reproduction. When `registry2.upgrade` is called on an un-upgraded element defined in a different registry, the element unexpectedly upgrades.
Attachments
Unexpected custom element customization (878 bytes, text/html)
2026-02-13 18:08 PST, Steve Orvell 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2026-02-20 18:09:11 PST
<rdar://problem/170846743>
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