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+---
+title: DocumentFragment
+slug: Web/API/DocumentFragment
+translation_of: Web/API/DocumentFragment
+---
+<p>{{ ApiRef("DOM") }}</p>
+
+<p><strong><span class="external"><code>DocumentFragment</code></span></strong> 介面表示了一個沒有父節點的最小化文件物件。<code>DocumentFragment</code> 被當作一種輕量化的 {{domxref("Document")}}，用如同標準文件一般的方式保存片段的文件結構（由節點組成）。關鍵的區別在於文件片段不是真實的 DOM 結構，文件片段的變動並不會影響目前的網頁文件，也不會導致回流（{{Glossary("reflow")}}）或引起任何影響效能的情況發生。</p>
+
+<p>一般的用法是建立一個 <code>DocumentFragment</code> 物件，在此物件中組織一個 DOM 的子樹。再使用 {{domxref("Node")}} 介面定義的方法，如 {{domxref("Node.appendChild", "appendChild()")}} 或 {{domxref("Node.insertBefore", "insertBefore()")}} 將這個文件片段加入或插入目前頁面的 DOM 當中。執行這個將文件片段中的節點置入 DOM 的動作之後，會留下一個空的 <code>DocumentFragment</code> 物件（只會插入物件中的節點，<code>DocumentFragment</code> 物件本身不會被插入）。由於文件片段中的所有節點是一次性的被插入目前頁面文件當中，故回流及頁面渲染只會被觸發一次，所以可用插入 <code>DocumentFragment</code> 物件的方式取代傳統分別插入多個節點至 DOM（將節點一個一個分次進行插入）的操作方式。</p>
+
+<p>此介面也適合與 Web components 搭配使用：{{HTMLElement("template")}} 元素在其 {{domxref("HTMLTemplateElement.content")}} 屬性中便包含了一個 <code>DocumentFragment</code> 物件。</p>
+
+<p>可使用 {{domxref("document.createDocumentFragment()")}} 方法或 <code>DocumentFragment</code> 的建構式來建立一個空的 <code>DocumentFragment</code> 物件。</p>
+
+<h2 id="Specification" name="Specification">屬性</h2>
+
+<p><em>This interface has no specific properties, but inherits those of its parent, </em><em>{{domxref("Node")}}, and implements those of the {{domxref("ParentNode")}} interface.</em></p>
+
+<dl>
+ <dt>{{ domxref("ParentNode.children") }} {{readonlyInline}}{{experimental_inline}}</dt>
+ <dd>Returns a live {{domxref("HTMLCollection")}} containing all objects of type {{domxref("Element")}} that are children of the <code>DocumentFragment</code> object.</dd>
+ <dt>{{ domxref("ParentNode.firstElementChild") }} {{readonlyInline}}{{experimental_inline}}</dt>
+ <dd>Returns the {{domxref("Element")}} that is the first child of the <code>DocumentFragment</code> object, or <code>null</code> if there is none.</dd>
+ <dt>{{ domxref("ParentNode.lastElementChild") }} {{readonlyInline}}{{experimental_inline}}</dt>
+ <dd>Returns the {{domxref("Element")}} that is the last child of the <code>DocumentFragment</code> object, or <code>null</code> if there is none.</dd>
+ <dt>{{ domxref("ParentNode.childElementCount") }} {{readonlyInline}}{{experimental_inline}}</dt>
+ <dd>Returns an <code>unsigned long</code> giving the amount of children that the <code>DocumentFragment</code> has.</dd>
+</dl>
+
+<h2 id="建構式">建構式</h2>
+
+<dl>
+ <dt>{{ domxref("DocumentFragment.DocumentFragment()", "DocumentFragment()") }} {{experimental_inline}}</dt>
+ <dd>Returns an empty <code>DocumentFragment</code> object.</dd>
+</dl>
+
+<h2 id="方法">方法</h2>
+
+<p><em>This interface inherits the methods of its parent, {{domxref("Node")}}<em>, and implements those of the {{domxref("ParentNode")}} interface</em></em><em>.</em></p>
+
+<dl>
+ <dt>{{domxref("DocumentFragment.find()")}} {{experimental_inline}}</dt>
+ <dd>Returns the first matching {{domxref("Element")}} in the tree of the <code>DocumentFragment</code>.</dd>
+ <dt>{{domxref("DocumentFragment.findAll()")}} {{experimental_inline}}</dt>
+ <dd>Returns a {{domxref("NodeList")}} of matching {{domxref("Element")}} in the tree of the <code>DocumentFragment</code>.</dd>
+ <dt>{{domxref("DocumentFragment.querySelector()")}}</dt>
+ <dd>Returns the first {{domxref("Element")}} node within the <code>DocumentFragment</code>, in document order, that matches the specified selectors.</dd>
+ <dt>{{domxref("DocumentFragment.querySelectorAll()")}}</dt>
+ <dd>Returns a {{domxref("NodeList")}} of all the {{domxref("Element")}} nodes within the <code>DocumentFragment</code> that match the specified selectors.</dd>
+</dl>
+
+<dl>
+ <dt>{{domxref("DocumentFragment.getElementById()")}}</dt>
+ <dd>Returns the first {{domxref("Element")}} node within the <code style="font-size: 14px;">DocumentFragment</code>, in document order, that matches the specified ID.</dd>
+</dl>
+
+<h2 id="Specifications" name="Specifications">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', '#interface-documentfragment', 'DocumentFragment')}}</td>
+   <td>{{Spec2('DOM WHATWG')}}</td>
+   <td>Added the constructor and the implementation of {{domxref("ParentNode")}}.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('Selectors API Level 2', '#the-apis', 'DocumentFragment')}}</td>
+   <td>{{Spec2('Selectors API Level 2')}}</td>
+   <td>Added the <code>find()</code> and <code>findAll()</code> methods.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('Selectors API Level 1', '#the-apis', 'DocumentFragment')}}</td>
+   <td>{{Spec2('Selectors API Level 1')}}</td>
+   <td>Added the <code>querySelector()</code> and <code>querySelectorAll()</code> methods.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('DOM3 Core', 'core.html#ID-B63ED1A3', 'DocumentFragment')}}</td>
+   <td>{{Spec2('DOM3 Core')}}</td>
+   <td>No change from {{SpecName('DOM2 Core')}}</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('DOM2 Core', 'core.html#ID-B63ED1A3', 'DocumentFragment')}}</td>
+   <td>{{Spec2('DOM2 Core')}}</td>
+   <td>No change from {{SpecName('DOM1')}}</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('DOM1', 'level-one-core.html#ID-B63ED1A3', 'DocumentFragment')}}</td>
+   <td>{{Spec2('DOM1')}}</td>
+   <td>Initial definition</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>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>1.0</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoDesktop("1.0")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+  <tr>
+   <td><code>querySelector()</code> and <code>querySelectorAll()</code></td>
+   <td>1.0</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoDesktop("1.9.1")}}</td>
+   <td>8.0</td>
+   <td>10.0</td>
+   <td>3.2 (525.3)</td>
+  </tr>
+  <tr>
+   <td><code>findAll()</code> and <code>find() </code>{{experimental_inline}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>DocumentFragment()</code> constructor {{experimental_inline}}</td>
+   <td>28.0</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoDesktop("24.0")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>15.0</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>ParentNode</code> properties {{experimental_inline}}</td>
+   <td>28.0</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoDesktop("25.0")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>15.0</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>ParentNode</code> methods {{experimental_inline}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</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>Edge</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("1.0")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+  <tr>
+   <td><code>querySelector()</code> and <code>querySelectorAll()</code></td>
+   <td>2.1</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("1.0")}}</td>
+   <td>8.0</td>
+   <td>10.0</td>
+   <td>3.2 (525.3)</td>
+  </tr>
+  <tr>
+   <td><code>findAll()</code> and <code>find() </code>{{experimental_inline}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>DocumentFragment()</code> constructor {{experimental_inline}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("24.0")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+  <tr>
+   <td><code>ParentNode</code> properties {{experimental_inline}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoMobile("25.0")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>5.0</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>ParentNode</code> methods {{experimental_inline}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="參見">參見</h2>
+
+<ul>
+ <li><a href="/docs/DOM/DOM_Reference" title="/en-US/docs/DOM/DOM_Reference">The DOM interfaces index.</a></li>
+</ul>