Custom Elements let web authors define their own tags. Chrome shipped an implementation based on the working draft of the spec in M33. The current editor's draft of the spec has significant updates based on web developer and implementer feedback.
Documentation
Specification
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.
- In development
- Positive
- Shipped/Shipping
- Positive
Owner
Last updated on 2020-11-09
Comments
Safari has indicated that they will not implement customized built-in elements, eg https://github.com/w3c/webcomponents/issues/544#issuecomment-239301184