BASELINE NowYouCanUse.com
Limited Availability Custom elements

Customized built-in elements

Customized built-in elements are HTML elements that extend built-in elements using the is attribute, to add new behaviors that you define.
Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Jan 15, 2020.
Desktop Browser Engine Support
Google Chrome
67
Supported
Mozilla Firefox
63
Supported
Apple Safari
—
Unsupported
Microsoft Edge
79
Supported
Mobile Browser Engine Support
Chrome Android
67
Firefox Android
63
Safari iOS
—
Specifications and References
Specification ↗ Feature XML ↗
MDN Browser Compat Data Keys:
api.CustomElementRegistry.builtin_element_support ↗ html.global_attributes.is ↗
id: customized-built-in-elements