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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: Request.clone()
+slug: Web/API/Request/clone
+translation_of: Web/API/Request/clone
+---
+<div>{{APIRef("Fetch")}}</div>
+
+<div></div>
+
+<p> {{domxref("Request")}} 接口中的<strong><code>clone()</code></strong> 方法可以创建一个当前<code>Request</code> 对象的副本。</p>
+
+<p> 如果响应体{{domxref("Body")}}已经被使用过,那么<code>clone()会抛出一个</code>{{jsxref("TypeError")}}。实际上,<code>clone()</code> 的主要作用就是支持{{domxref("Body")}}对象的多次使用</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="brush: js">var newRequest = request.clone();</pre>
+
+<h3 id="参数">参数</h3>
+
+<p>无。</p>
+
+<h3 id="返回值">返回值</h3>
+
+<p>{{domxref("Request")}}对象,也就是<code>Request的完整拷贝</code></p>
+
+<h2 id="示例">示例</h2>
+
+<p>在下面的代码中,我们使用<code>{{domxref("Request.Request()")}}构造函数创建了一个新的request对象(请求当前文件夹中的一个图片文件),然后拷贝了这个request对象。</code></p>
+
+<pre class="brush: js">var myRequest = new Request('flowers.jpg');
+var newRequest = myRequest.clone(); // a copy of the request is now stored in newRequest</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">规范</th>
+ <th scope="col">状态</th>
+ <th scope="col">说明</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('Fetch','#dom-request-clone','clone')}}</td>
+ <td>{{Spec2('Fetch')}}</td>
+ <td>初始化定义</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("api.Request.clone")}}</p>
+
+<h2 id="了解更多">了解更多</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/ServiceWorker_API">ServiceWorker API</a></li>
+ <li><a href="/en-US/docs/Web/HTTP/Access_control_CORS">HTTP access control (CORS)</a></li>
+ <li><a href="/en-US/docs/Web/HTTP">HTTP</a></li>
+</ul>