The HTMLUnknownElement interface represents an invalid HTML element and derives from the HTMLElement interface, but without implementing any additional properties or methods.
No specific property; inherits properties from its parent, HTMLElement.
No specific method; inherits properties from its parent, HTMLElement.
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'HTMLUnknownElement' in that specification. | Living Standard | No change from HTML5. |
| HTML5 The definition of 'HTMLUnknownElement' in that specification. | Recommendation | Initial definition. |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
<bgsound>, <blink>, <isindex>, <multicol>, <nextid>, <rb>, <spacer>
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https://developer.mozilla.org/en-US/docs/Web/API/HTMLUnknownElement