Autonomous custom elements

Autonomous custom elements are HTML elements with a hyphenated tag name (like <example-element>) that have behaviors you define.

Compatibility

• Chrome 54 Released on 2016-10-12
• Chrome Android 54 Released on 2016-10-19
• Edge 79 Released on 2020-01-15
• Firefox 63 Released on 2018-10-23
• Firefox for Android 63 Released on 2018-10-23
• Safari 10.1 Released on 2017-03-27
• Safari on iOS 10.3 Released on 2017-03-27

BCD data

• css.selectors.defined
• api.CustomElementRegistry
• api.CustomElementRegistry.define
• api.Window.customElements