310890 2026-03-27 06:40:33 -0700 cloning a node containing an element with a null customElementRegistry does not retain regsitry 2026-04-03 06:41:11 -0700 1 1 1 Unclassified WebKit DOM WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 154907 1 steveorvell webkit-unassigned karlcow rniwa webkit-bug-importer oldest_to_newest 2194300 0 steveorvell 2026-03-27 06:40:33 -0700 1. deep clone an element with registry containing a null registry child 2. check the customElementRegistry of the cloned child. The cloned child should, I think, have a null registry based on https://dom.spec.whatwg.org/#concept-node-clone. See repro: https://codepen.io/editor/Steve-Orvell/pen/019d20b4-8501-7be8-bdee-50ab42b316b0 2194301 1 steveorvell 2026-03-27 06:41:06 -0700 See also: https://issues.chromium.org/issues/496807670 2196588 2 webkit-bug-importer 2026-04-03 06:41:11 -0700 <rdar://problem/174011757>