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+---
+title: Client
+slug: Web/API/Client
+tags:
+  - API
+  - Client
+  - Experimental
+  - Interface
+  - NeedsTranslation
+  - Reference
+  - Service Workers
+  - ServiceWorkerClient
+  - ServiceWorkers
+  - TopicStub
+translation_of: Web/API/Client
+---
+<p>{{SeeCompatTable}}{{APIRef("Service Workers API")}}</p>
+
+<p><code>Client</code> 接口表示一个可执行的上下文，如{{domxref("Worker")}}或{{domxref("SharedWorker")}}。{{domxref("Window")}} 客户端由更具体的{{domxref("WindowClient")}}表示。 你可以从{{domxref("Clients.matchAll","Clients.matchAll()")}} 和{{domxref("Clients.get","Clients.get()")}}等方法获取<code>Client</code>/<code>WindowClient</code>对象。</p>
+
+<h2 id="Methods">Methods</h2>
+
+<dl>
+ <dt>{{domxref("Client.postMessage()")}}</dt>
+ <dd>向client发送一条消息。</dd>
+</dl>
+
+<h2 id="Properties">Properties</h2>
+
+<dl>
+ <dt>{{domxref("Client.id")}} {{readonlyInline}}</dt>
+ <dd>客户端的唯一通用标识符，字符串形式。</dd>
+ <dt>{{domxref("Client.type")}} {{readonlyInline}}</dt>
+ <dd>客户端的类型，字符串形式。可能是"<code>window"</code>, "<code>worker"</code>, 或 "<code>sharedworker"。</code></dd>
+ <dt>{{domxref("Client.url")}} {{readonlyInline}}</dt>
+ <dd>客户端的URL，字符串形式。</dd>
+</dl>
+
+<h2 id="规范">规范</h2>
+
+<table>
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Service Workers', '#client', 'Client')}}</td>
+   <td>{{Spec2('Service Workers')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<table>
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari (WebKit)</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatChrome(40)}}</td>
+   <td>{{ CompatGeckoDesktop("44.0") }}<sup>[1]</sup></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatOpera(27)}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>type</code> property</td>
+   <td>{{CompatChrome(60)}}</td>
+   <td>{{ CompatGeckoDesktop("54.0") }}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatOpera(47)}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<table>
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android Webview</th>
+   <th>Chrome for Android</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>{{CompatChrome(40)}}</td>
+   <td>{{CompatChrome(40)}}</td>
+   <td>{{ CompatGeckoMobile("44.0") }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatOperaMobile(27)}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td><code>type</code> property</td>
+   <td>{{CompatChrome(60)}}</td>
+   <td>{{CompatChrome(60)}}</td>
+   <td>{{ CompatGeckoMobile("54.0") }}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatOperaMobile(47)}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<ul>
+ <li>[1] Service workers (and <a href="https://developer.mozilla.org/en-US/docs/Web/API/Push_API">Push</a>) have been disabled in the <a href="https://www.mozilla.org/en-US/firefox/organizations/">Firefox 45 &amp; 52 Extended Support Releases</a> (ESR.)</li>
+</ul>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>使用<a href="https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker_API/Using_Service_Workers">Service Workers</a></li>
+ <li><a href="https://jakearchibald.github.io/isserviceworkerready/">ServiceWorker准备好了么?</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">Promises</a></li>
+</ul>