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+---
+title: WindowClient.visibilityState
+slug: Web/API/WindowClient/visibilityState
+translation_of: Web/API/WindowClient/visibilityState
+---
+<p><span style="line-height: 19.0909080505371px;">{{SeeCompatTable}}{{APIRef("Service Workers API")}}</span></p>
+
+<p><span style="line-height: 19.0909080505371px;">La propriété <strong><code>visibilityState</code></strong>,  en lecture seule de l'interface {{domxref("WindowClient")}} indique la visibilité du client courant</span>. La valeur pourra être :  <code>hidden</code>, <code>visible</code>, <code>prerender</code>, or <code>unloaded</code>.</p>
+
+<h2 id="Syntaxe">Syntaxe</h2>
+
+<pre class="brush: js">myVisState = WindowClient.visibilityState;</pre>
+
+<h3 id="Value">Value</h3>
+
+<p>une  {{domxref("DOMString")}}.</p>
+
+<h2 id="Example">Example</h2>
+
+<pre class="brush: js">  event.waitUntil(clients.matchAll({
+    type: "window"
+  }).then(function(clientList) {
+    for (var i = 0; i &lt; clientList.length; i++) {
+      var client = clientList[i];
+      if (client.url == '/' &amp;&amp; 'focus' in client) {
+        if(visibilityState === 'hidden')
+          return client.focus();
+        }
+      }
+    }
+    if (clients.openWindow)
+      return clients.openWindow('/');
+  }));
+});</pre>
+
+<h2 id="Spécifications" style="line-height: 30px; font-size: 2.14285714285714rem;">Spécifications</h2>
+
+<table class="standard-table" style="line-height: 19.0909080505371px;">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Service Workers', '#window-client-interface', 'WindowClient')}}</td>
+   <td>{{Spec2('Service Workers')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilité_des_Navigateurs">Compatibilité des Navigateurs</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-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(42.0)}}</td>
+   <td>{{ CompatGeckoDesktop("44.0") }}<sup>[1]</sup></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</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>Firefox Mobile (Gecko)</th>
+   <th>Firefox OS</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{ CompatGeckoMobile("44.0") }}</td>
+   <td>{{ CompatVersionUnknown }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(42.0)}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<p>[1] Service workers (and <a href="/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 and 52 Extended Support Releases</a> (ESR.)</p>