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---
title: WindowClient.focused
slug: Web/API/WindowClient/focused
translation_of: Web/API/WindowClient/focused
---
<div>{{SeeCompatTable}}{{APIRef("Service Workers API")}}</div>
<p>La propriété <strong><code>focused</code></strong> , en lecture seule de l'interface {{domxref("WindowClient")}} , est un {{domxref("Boolean")}} qui indique si client actuel a le focus .</p>
<h2 id="Syntax">Syntax</h2>
<pre class="syntaxbox">myFocused = WindowClient.focused;</pre>
<h3 id="Value">Value</h3>
<p>A {{domxref("Boolean")}}.</p>
<h2 id="Example">Example</h2>
<pre class="brush: js">self.addEventListener('notificationclick', function(event) {
console.log('On notification click: ', event.notification.tag);
event.notification.close();
// This looks to see if the current is already open and
// focuses if it is
event.waitUntil(clients.matchAll({
type: "window"
}).then(function(clientList) {
for (var i = 0; i < clientList.length; i++) {
var client = clientList[i];
if (client.url == '/' && 'focus' in client) {
if(!client.focused)
return client.focus();
}
}
}
if (clients.openWindow)
return clients.openWindow('/');
}));
});</pre>
<h2 id="Specifications">Specifications</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', '#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>
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