---
title: Selection.containsNode()
slug: Web/API/Selection/containsNode
translation_of: Web/API/Selection/containsNode
---
<div>{{ ApiRef("DOM") }}{{SeeCompatTable}}</div>

<p><strong><code>Selection.containsNode()</code></strong> 判断指定的节点是否包含在Selection中(是否被选中).</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox"><em>sel</em>.containsNode(<em>aNode</em>,<em>aPartlyContained</em>)
</pre>

<h3 id="参数">参数</h3>

<dl>
 <dt><em><code>aNode</code></em></dt>
 <dd>用于判断是否包含在Selection中的那个节点</dd>
 <dt><em><code>aPartlyContained</code></em></dt>
 <dd>当此参数为<code>true时</code>, 当<code>selection包含节点aNode的一部分或全部时，containsNode()返回true</code>.<br>
 当此参数为<code>false时</code>, 只有当selection完全包含节点aNode时，<code>containsNode()</code> 才返回true.</dd>
</dl>

<h2 id="例子">例子</h2>

<pre class="eval"> /* 检查body中是否有节点被选中 */
 console.log(window.getSelection().containsNode(document.body, true));</pre>

<h2 id="相关规范">相关规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">规范</th>
   <th scope="col">状态</th>
   <th scope="col">备注</th>
  </tr>
  <tr>
   <td>{{SpecName('HTML Editing', '#dom-selection-containsNode', 'Selection.containsNode')}}</td>
   <td>{{Spec2('HTML Editing')}}</td>
   <td>Initial definition</td>
  </tr>
  <tr>
   <td>{{SpecName('Selection API', '#widl-Selection-containsNode-boolean-Node-node-boolean-allowPartialContainment', 'Selection.containsNode()')}}</td>
   <td>{{Spec2('Selection API')}}</td>
   <td>Current</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>特性</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari (WebKit)</th>
  </tr>
  <tr>
   <td>基础特性支持</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatGeckoDesktop(2)}}[1]</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table" style="height: 57px; width: 891px;">
 <tbody>
  <tr>
   <th>特性</th>
   <th>Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>Firefox OS</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>基础特性支持</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatGeckoMobile(2)}}[1]</td>
   <td>1.0</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] 在Firefox 35之前版本的浏览器中, 此方法不会在aNode为null时抛出异常.</p>

<h2 id="参考">参考</h2>

<ul>
 <li>{{domxref("Selection")}}, Selection接口规范.</li>
</ul>