Web platform features explorer - Customized built-in elements

Web platform features explorer

Tags: api html Groups: HTML > Custom elements

Customized built-in elements are HTML elements that extend built-in elements using the is attribute, to add new behaviors that you define.

Learning resources on MDN

is

Browser support

Chrome 67 Released on 2018-05-29
Chrome Android 67 Released on 2018-05-31
Edge 79 Released on 2020-01-15
Firefox 63 Released on 2018-10-23
Firefox for Android 63 Released on 2018-10-23
Safari ❌ See webkit.org/b/182671 Vendor position : oppose
Safari on iOS ❌ See webkit.org/b/182671 Vendor position : oppose

Baseline availability blocked since January 2020 by Safari (63 months)

Specifications

HTML (#customized-built-in-element), from HTML Workstream (WHATWG).

View web-platform-tests results for this feature - View the feature source file (dist) - Edit the feature - Report an issue about this feature