Bug 196165

Summary: CustomElementRegistry#upgrade is not implemented
Product: WebKit Reporter: Justin Fagnani <justinfagnani>
Component: DOMAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Major CC: rniwa
Priority: P2    
Version: Safari 12   
Hardware: Unspecified   
OS: Unspecified   

Description Justin Fagnani 2019-03-22 16:23:46 PDT
https://html.spec.whatwg.org/multipage/custom-elements.html#dom-customelementregistry-upgrade

This is implemented in both Chromium and Gecko.
Comment 1 Ryosuke Niwa 2019-03-23 23:37:36 PDT
Has been fixed in iOS 12.2 and Safari 12.1.

*** This bug has been marked as a duplicate of bug 183397 ***