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.



Working draft or equivalent

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 67
  • Chrome for Android release 67
  • Android WebView release 67

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