NEW 299669
elements with a custom customElementRegistry can fail to upgrade 
https://bugs.webkit.org/show_bug.cgi?id=299669
Summary elements with a custom customElementRegistry can fail to upgrade
Steve Orvell
Reported 2025-09-27 13:17:48 PDT
If an element is created with a constructed customElementRegistry, then connected to the document, then defined in its registry, it fails to upgrade. It remains un-upgraded even if `el.customElementRegistry.upgrade(el)` is called. However, if the element is defined *before* being connected, it upgrades successfully. See reproduction: https://codepen.io/Steve-Orvell/pen/GgooEqG?editors=1000
Attachments
Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2025-10-04 13:18:10 PDT
<rdar://problem/161964159>
Radar WebKit Bug Importer
Comment 2 2025-10-04 13:18:10 PDT
<rdar://problem/161964115>
Note You need to log in before you can comment on or make changes to this bug.