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----
-title: ParentNode.prepend()
-slug: orphaned/Web/API/ParentNode/prepend
-tags:
-  - API
-  - DOM
-  - Method
-  - Node
-  - ParentNode
-  - Reference
-  - prepend
-  - 方法
-translation_of: Web/API/ParentNode/prepend
-original_slug: Web/API/ParentNode/prepend
----
-<div>{{APIRef("DOM")}}</div>
-
-<p><strong><code>ParentNode.prepend</code></strong> 方法可以在父节点的第一个子节点之前插入一系列{{domxref("Node")}}对象或者{{domxref("DOMString")}}对象。{{domxref("DOMString")}}会被当作{{domxref("Text")}}节点对待（也就是说插入的不是HTML代码）。</p>
-
-<h2 id="语法">语法</h2>
-
-<pre class="syntaxbox">ParentNode.prepend((Node or DOMString)... nodes);
-</pre>
-
-<h3 id="参数">参数</h3>
-
-<dl>
- <dt><code>nodes</code></dt>
- <dd>要插入的一系列{{domxref("Node")}}或者{{domxref("DOMString")}}。</dd>
-</dl>
-
-<h3 id="返回值">返回值</h3>
-
-<p><code>undefined</code>.</p>
-
-<h3 id="错误">错误</h3>
-
-<ul>
- <li>{{domxref("HierarchyRequestError")}}：节点不能插入当前层级内。</li>
-</ul>
-
-<h2 id="例子">例子</h2>
-
-<h3 id="Prepending_an_element">Prepending an element</h3>
-
-<pre class="brush: js">var parent = document.createElement("div");
-var p = document.createElement("p");
-var span = document.createElement("span");
-parent.append(p);
-parent.prepend(span);
-
-console.log(parent.childNodes); // NodeList [ &lt;span&gt;, &lt;p&gt; ]
-</pre>
-
-<h3 id="Prepending_text">Prepending text</h3>
-
-<pre class="brush: js">var parent = document.createElement("div");
-parent.append("Some text");
-parent.prepend("Headline: ");
-
-console.log(parent.textContent); // "Headline: Some text"</pre>
-
-<h3 id="Appending_an_element_and_text">Appending an element and text</h3>
-
-<pre class="brush: js">var parent = document.createElement("div");
-var p = document.createElement("p");
-parent.prepend("Some text", p);
-
-console.log(parent.childNodes); // NodeList [ #text "Some text", &lt;p&gt; ]</pre>
-
-<h3 id="ParentNode.prepend_is_unscopable"><code>ParentNode.prepend()</code> is unscopable</h3>
-
-<p><code>prepend()不能在with语句内使用，详情参考</code>{{jsxref("Symbol.unscopables")}}。</p>
-
-<pre class="brush: js">var parent = document.createElement("div");
-
-with(parent) {
-  prepend("foo");
-}
-// ReferenceError: prepend is not defined </pre>
-
-<h2 id="Polyfill">Polyfill</h2>
-
-<p>使用下面的代码在IE9或更高版本中模拟<code>prepend()</code>方法：</p>
-
-<pre class="brush: js">// from: https://github.com/jserz/js_piece/blob/master/DOM/ParentNode/prepend()/prepend().md
-(function (arr) {
-    arr.forEach(function (item) {
-        item.prepend = item.prepend || function () {
-            var argArr = Array.prototype.slice.call(arguments),
-                docFrag = document.createDocumentFragment();
-
-            argArr.forEach(function (argItem) {
-                var isNode = argItem instanceof Node;
-                docFrag.appendChild(isNode ? argItem : document.createTextNode(String(argItem)));
-            });
-
-            this.insertBefore(docFrag, this.firstChild);
-        };
-    });
-})([Element.prototype, Document.prototype, DocumentFragment.prototype]);</pre>
-
-<h2 id="说明">说明</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', '#dom-parentnode-prepend', 'ParentNode.prepend()')}}</td>
-   <td>{{Spec2('DOM WHATWG')}}</td>
-   <td>Initial definition.</td>
-  </tr>
- </tbody>
-</table>
-
-<h2 id="兼容性">兼容性</h2>
-
-
-
-<p>{{Compat("api.ParentNode.prepend")}}</p>
-
-<h2 id="See_also">See also</h2>
-
-<ul>
- <li>{{domxref("ParentNode")}} and {{domxref("ChildNode")}}</li>
- <li>{{domxref("ParentNode.append()")}}</li>
- <li>{{domxref("Node.appendChild()")}}</li>
- <li>{{domxref("Node.insertBefore()")}}</li>
- <li>{{domxref("ChildNode.before()")}}</li>
- <li>{{domxref("NodeList")}}</li>
-</ul>