index.md

---
title: HTMLUnknownElement
slug: Web/API/HTMLUnknownElement
page-type: web-api-interface
browser-compat: api.HTMLUnknownElement
---

{{APIRef("HTML DOM")}}

The **`HTMLUnknownElement`** interface represents an invalid HTML element and derives from the {{DOMxRef("HTMLElement")}} interface, but without implementing any additional properties or methods.

{{InheritanceDiagram}}

## Instance properties

_No specific property; inherits properties from its parent, {{DOMxRef("HTMLElement")}}._

## Instance methods

_No specific method; inherits methods from its parent, {{DOMxRef("HTMLElement")}}._

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}