Customized built-in elements
Limited availability
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
No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.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