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.
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Specifications
- HTML (#customized-built-in-element), from HTML Workstream (WHATWG).
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 (66 months)
Web Platform Tests (WPT)
View the latest WPT test results for this featureView as JSON | Edit this feature | Report an issue | Web-features entry: source, dist