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.
Status in Chromium
Enabled by default (tracking bug) in:
- Chrome for desktop release 54
- Chrome for Android release 54
- Android WebView release 54
Consensus & Standardization
Last updated on 2020-11-09