Authors can now create custom elements which inherit from the semantics of native, built-in elements. This is helpful when web authors want to add features to their custom elements, but they cannot be implemented in CSS or JavaScript though the features are available in built-in elements.



Specification link

Specification currently under development in a Working Group

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.


Last updated on 2020-11-09