From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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+---
+title: Clients
+slug: Web/API/Clients
+translation_of: Web/API/Clients
+---
+<p>{{SeeCompatTable}}{{APIRef("Service Workers API")}}</p>
+
+<p><span class="seoSummary"><code>Clients</code> 接口提供对 {{domxref("Client")}} 对象的访问. 通过在  <a href="/en-US/docs/Web/API/ServiceWorker_API">service worker</a> 中使用 <code>{{domxref("ServiceWorkerGlobalScope", "self")}}.clients</code> 访问它.</span></p>
+
+<h2 id="方法">方法</h2>
+
+<dl>
+ <dt>{{domxref("Clients.get()")}}</dt>
+ <dd>返回一个匹配给定 {{domxref("Client.id", "id")}} 的 {{domxref("Client")}} 的 {{jsxref("Promise")}} .</dd>
+ <dt>{{domxref("Clients.matchAll()")}}</dt>
+ <dd>返回一个 {{domxref("Client")}} 对象数组的 {{jsxref("Promise")}} . options参数允许您控制返回的clients类型. </dd>
+ <dt>{{domxref("Clients.openWindow()")}}</dt>
+ <dd>打开给定URL的新浏览器窗口，并返回新 {{domxref("WindowClient")}} a 的 {{jsxref("Promise")}} .</dd>
+ <dt>{{domxref("Clients.claim()")}}</dt>
+ <dd>允许一个激活的 service worker 将自己设置为其{{domxref("ServiceWorkerRegistration.scope", "scope")}} 内所有 clients 的 {{domxref("ServiceWorkerContainer.controller", "controller")}} . </dd>
+</dl>
+
+<h2 id="示例">示例</h2>
+
+<p>下面示例显示一个已有的聊天窗口，或者当用户点击通知时创建新的窗口.</p>
+
+<pre class="brush: js">addEventListener('notificationclick', event =&gt; {
+  event.waitUntil(async function() {
+    const allClients = await clients.matchAll({
+      includeUncontrolled: true
+    });
+
+    let chatClient;
+
+    // Let's see if we already have a chat window open:
+    for (const client of allClients) {
+      const url = new URL(client.url);
+
+      if (url.pathname == '/chat/') {
+        // Excellent, let's use it!
+        client.focus();
+        chatClient = client;
+        break;
+      }
+    }
+
+    // If we didn't find an existing chat window,
+    // open a new one:
+    if (!chatClient) {
+      chatClient = await clients.openWindow('/chat/');
+    }
+
+    // Message the client:
+    chatClient.postMessage("New chat messages!");
+  }());
+});
+</pre>
+
+<h2 id="规范">规范</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('Service Workers', '#clients', 'Clients')}}</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>
+
+<div>
+
+
+<p>{{Compat("api.Clients")}}</p>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/ServiceWorker_API/Using_Service_Workers">Using Service Workers</a></li>
+ <li><a href="https://jakearchibald.github.io/isserviceworkerready/">Is ServiceWorker ready?</a></li>
+ <li>{{jsxref("Promise")}}</li>
+</ul>
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