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---
title: ParentNode
slug: Web/API/ParentNode
translation_of: Web/API/ParentNode
---
<div>{{APIRef("DOM")}}</div>
<p><code><strong>ParentNode</strong></code> 介面定義了可以擁有子節點之 {{domxref("Node")}} 物件的方法。</p>
<p><code>ParentNode</code> 是一個原始的介面，且不能以此建立物件實體。{{domxref("Element")}}、{{domxref("Document")}} 及 {{domxref("DocumentFragment")}} 物件皆實作了 <code>ParentNode</code>。</p>
<h2 id="屬性">屬性</h2>
<dl>
<dt>{{domxref("ParentNode.children")}} {{experimental_inline}} {{readonlyInline}}</dt>
<dd>該屬性會返回一個 {{domxref("HTMLCollection")}} 實例，包括 <code>ParentNode</code>的所有子元素節點，需要特別注意的是：該屬性為<code>唯讀</code>。</dd>
<dt>{{domxref("ParentNode.firstElementChild")}} {{experimental_inline}} {{readonlyInline}}</dt>
<dd>該屬性會返回 <code>ParentNode</code>的第一個子元素 ，如果該節點沒有子節點則返回<code>null</code>。</dd>
<dt>{{domxref("ParentNode.lastElementChild")}} {{experimental_inline}} {{readonlyInline}}</dt>
<dd>該屬性會返回 <code>ParentNode</code>的最後一個子元素 ，如果該節點沒有子節點則返回<code>null</code>。</dd>
<dt>{{domxref("ParentNode.childElementCount")}} {{experimental_inline}} {{readonlyInline}}</dt>
<dd>該屬性會返回一個<code>無符號長整數</code> ，該值表示了該節點的子節點數量。</dd>
</dl>
<h2 id="方法">方法</h2>
<dl>
<dt>{{domxref("ParentNode.append()")}} {{experimental_inline}}</dt>
<dd>Inserts a set of {{domxref("Node")}} objects or {{domxref("DOMString")}} objects after the last child of the <code>ParentNode</code>. {{domxref("DOMString")}} objects are inserted as equivalent {{domxref("Text")}} nodes.</dd>
<dt>{{domxref("ParentNode.prepend()")}} {{experimental_inline}}</dt>
<dd>Inserts a set of {{domxref("Node")}} objects or {{domxref("DOMString")}} objects before the first child of the <code>ParentNode</code>. {{domxref("DOMString")}} objects are inserted as equivalent {{domxref("Text")}} nodes.</dd>
<dt>{{domxref("ParentNode.querySelector()")}}</dt>
<dd>Returns the first {{domxref("Element")}} with the current element as root that matches the specified group of selectors.</dd>
<dt>{{domxref("ParentNode.querySelectorAll()")}}</dt>
<dd>Returns a {{domxref("NodeList")}} representing a list of elements with the current element as root that matches the specified group of selectors.</dd>
</dl>
<h2 id="規範">規範</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('DOM WHATWG', '#parentnode', 'ParentNode')}}</td>
<td>{{Spec2('DOM WHATWG')}}</td>
<td>Added the <code>append()</code> and <code>prepend()</code> methods.</td>
</tr>
<tr>
<td>{{SpecName('DOM4', '#parentnode', 'ParentNode')}}</td>
<td>{{Spec2('DOM4')}}</td>
<td>Splitted the <code>ElementTraversal</code> interface in {{domxref("ChildNode")}} and <code>ParentNode</code>. The <code>firstElementChild</code>, <code>lastElementChild</code>, and <code>childElementCount</code> properties are now defined on the latter.<br>
The {{domxref("Document")}} and {{domxref("DocumentFragment")}} implemented the new interfaces.<br>
Added the <code>children</code> property and the <code>querySelector()</code> and <code>querySelectorAll()</code> methods.</td>
</tr>
<tr>
<td>{{SpecName('Element Traversal', '#interface-elementTraversal', 'ElementTraversal')}}</td>
<td>{{Spec2('Element Traversal')}}</td>
<td>Added the initial definition of its properties to the <code>ElementTraversal</code> pure interface and used it on {{domxref("Element")}}.</td>
</tr>
</tbody>
</table>
<h2 id="瀏覽器相容性">瀏覽器相容性</h2>
<p>{{CompatibilityTable}}</p>
<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</th>
</tr>
<tr>
<td>Basic support (on {{domxref("Element")}})</td>
<td>{{CompatChrome(1.0)}}</td>
<td>{{CompatGeckoDesktop("1.9.1")}}</td>
<td>9.0 [1]</td>
<td>10.0</td>
<td>4.0</td>
</tr>
<tr>
<td>Support on {{domxref("Document")}} and {{domxref("DocumentFragment")}} {{experimental_inline}}</td>
<td>{{CompatChrome(29.0)}}</td>
<td>{{CompatGeckoDesktop(25)}}</td>
<td>{{CompatNo}}</td>
<td>16.0</td>
<td>{{CompatNo}}</td>
</tr>
<tr>
<td><code>append()</code> and <code>prepend()</code> {{experimental_inline}}</td>
<td>{{CompatChrome(54.0)}}</td>
<td>{{CompatGeckoDesktop(49)}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatOpera(39)}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Android Webview</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
<th>Chrome for Mobile</th>
</tr>
<tr>
<td>Basic support (on {{domxref("Element")}})</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatGeckoMobile("1.9.1")}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
</tr>
<tr>
<td>Support on {{domxref("Document")}} and {{domxref("DocumentFragment")}} {{experimental_inline}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatGeckoMobile(25)}}</td>
<td>{{CompatNo}}</td>
<td>16.0</td>
<td>{{CompatNo}}</td>
<td>{{CompatVersionUnknown}}</td>
</tr>
<tr>
<td><code>append()</code> and <code>prepend()</code> {{experimental_inline}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatChrome(54.0)}}</td>
<td>{{CompatGeckoMobile(49)}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatOperaMobile(39)}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatChrome(54.0)}}</td>
</tr>
</tbody>
</table>
</div>
<p>[1] Internet Explorer 6, 7 and 8 supported it, but erroneously returns {{domxref("Comment")}} nodes as part of the results.</p>
<h2 id="參見">參見</h2>
<ul>
<li>The {{domxref("ChildNode")}} pure interface.</li>
<li>
<div class="syntaxbox">Object types implementing this pure interface: {{domxref("Document")}}, {{domxref("Element")}}, and {{domxref("DocumentFragment")}}.</div>
</li>
</ul>
|
