[Webkit-unassigned] [Bug 231575] New: Customized built-in elements

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Oct 12 07:31:38 PDT 2021


            Bug ID: 231575
           Summary: Customized built-in elements
           Product: WebKit
           Version: Safari 15
          Hardware: All
                OS: All
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: steveblue at gmail.com

Web Components are indispensible for user interface development although major portions of the set of specifications that comprise Web Components are missing in WebKit. One specification that should be supported in WebKit is customized built-in elements. Would Apple reconsider their position regarding customized built-in elements given the specification is broadly supported in Chrome, Firefox, and Edge?

As a web developer, omissions from specifications documented in the HTML Living Standard are problematic at best. It makes our jobs difficult having to track the missing features from WebKit. Having to load a polyfill for customized built-in elements in Safari reduces the benefit of custom elements for the end user, because they are expected to be parsed and rendered directly by the browser.

Link to specification: https://html.spec.whatwg.org/multipage/custom-elements.html#custom-elements-customized-builtin-example

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