Revision 411857 of HTMLUnknownElement

<div>
  {{ DomRef() }}</div>
<p>The <strong><code><span class="external">HTMLUnknownElement</span></code></strong> interface represents an invalid HTMLelement and derives from the {{ domxref("HTMLElement") }} interface, but without implementing any additional properties or methods.</p>
<h2 id="Properties">Properties</h2>
<p><em>No specific property; inherits properties from its parent, {{domxref("HTMLElement")}}.</em></p>
<h2 id="Methods">Methods</h2>
<p><em>No specific method; inherits properties from its parent, {{domxref("HTMLElement")}}.</em></p>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
  <tbody>
    <tr>
      <th scope="col">Specification</th>
      <th scope="col">Status</th>
      <th scope="col">Comment</th>
    </tr>
    <tr>
      <td>{{SpecName('HTML WHATWG', "elements.html#htmlunknownelement", "HTMLUnknownElement")}}</td>
      <td>{{Spec2('HTML WHATWG')}}</td>
      <td>No change from {{SpecName("HTML5 W3C")}}.</td>
    </tr>
    <tr>
      <td>{{SpecName('HTML5 W3C', "dom.html#htmlunknownelement", "HTMLUnknownElement")}}</td>
      <td>{{Spec2('HTML5 W3C')}}</td>
      <td>Initial definition.</td>
    </tr>
  </tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<div>
  {{CompatibilityTable}}</div>
<div id="compat-desktop">
  <table class="compat-table">
    <tbody>
      <tr>
        <th>Feature</th>
        <th>Chrome</th>
        <th>Firefox (Gecko)</th>
        <th>Internet Explorer</th>
        <th>Opera</th>
        <th>Safari (WebKit)</th>
      </tr>
      <tr>
        <td>Basic support</td>
        <td>{{CompatVersionUnknown}}</td>
        <td>{{CompatVersionUnknown}}</td>
        <td>{{CompatVersionUnknown}}</td>
        <td>{{CompatVersionUnknown}}</td>
        <td>{{CompatVersionUnknown}}</td>
      </tr>
    </tbody>
  </table>
</div>
<div id="compat-mobile">
  <table class="compat-table">
    <tbody>
      <tr>
        <th>Feature</th>
        <th>Android</th>
        <th>Firefox Mobile (Gecko)</th>
        <th>IE Phone</th>
        <th>Opera Mobile</th>
        <th>Safari Mobile</th>
      </tr>
      <tr>
        <td>Basic support</td>
        <td>{{CompatVersionUnknown}}</td>
        <td>{{CompatVersionUnknown}}</td>
        <td>{{CompatVersionUnknown}}</td>
        <td>{{CompatVersionUnknown}}</td>
        <td>{{CompatVersionUnknown}}</td>
      </tr>
    </tbody>
  </table>
</div>
<h2 id="See_also">See also</h2>
<ul>
  <li>Obsolete HTML elements implementing this interface: {{HTMLElement("bgsound")}}, {{HTMLElement("isindex")}}, {{HTMLElement("multicol")}}, {{HTMLElement("nextid")}}, {{HTMLElement("rb")}}, and {{HTMLElement("spacer")}}.</li>
</ul>
<div>
  &nbsp;</div>