Custom Elements v1

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.

Comments

Safari has indicated that they will not implement customized built-in elements, eg https://github.com/w3c/webcomponents/issues/544#issuecomment-239301184

Documentation

https://developers.google.com/web/fundamentals/web-components/customelements
https://docs.google.com/a/chromium.org/presentation/d/179IRXRFmDGb3P60OVsoAIsElcaOp__5EuIWLcL8oNos/edit?usp=sharing

Specification

Working draft or equivalent

Status in Chromium

Blink components: Blink

Enabled by default (tracking bug) in:

Chrome for desktop release 54
Chrome for Android release 54
Android WebView release 54
Opera release 41
Opera for Android release 41

Consensus & Standardization

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

Firefox: In development
Edge: Public support
Safari: Shipped
Web Developers: Positive

Owner

dominicc@chromium.org

Last updated on 2018-04-13