---
title: HTMLUnknownElement
slug: Web/API/HTMLUnknownElement
tags:
  - 无效 标签 未知
translation_of: Web/API/HTMLUnknownElement
---
<div>
<div>{{ APIRef("HTML DOM") }}</div>
</div>

<p><strong><code>HTMLUnknownElement</code></strong> 代表着一个无效的HTML元素，派生自 {{domxref("HTMLElement")}} 接口,，但它没有任何可用的附加属性或方法.</p>

<h2 id="属性">属性</h2>

<p><em>没有特效属性，继承自父级 {{domxref("HTMLElement")}}.</em></p>

<h2 id="方法">方法</h2>

<p><em>没有指定方法;继承来自父级的属性, {{domxref("HTMLElement")}}.</em></p>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">规范</th>
   <th scope="col">状态</th>
   <th scope="col">建议</th>
  </tr>
  <tr>
   <td>{{SpecName('HTML WHATWG', "elements.html#htmlunknownelement", "HTMLUnknownElement")}}</td>
   <td>{{Spec2('HTML WHATWG')}}</td>
   <td>没有修改{{SpecName("HTML5 W3C")}}.</td>
  </tr>
  <tr>
   <td>{{SpecName('HTML5 W3C', "dom.html#htmlunknownelement", "HTMLUnknownElement")}}</td>
   <td>{{Spec2('HTML5 W3C')}}</td>
   <td>初始定义</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

<div>{{CompatibilityTable}}</div>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Edge</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>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Edge</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>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="相关内容">相关内容</h2>

<ul>
 <li>Obsolete or non-standard HTML elements implementing this interface: {{HTMLElement("bgsound")}}, {{HTMLElement("blink")}}, {{HTMLElement("isindex")}}, {{HTMLElement("multicol")}}, {{HTMLElement("nextid")}}, {{HTMLElement("rb")}}, {{HTMLElement("spacer")}}</li>
</ul>