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---
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>
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