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+---
+title: API Push
+slug: Web/API/API_Push
+translation_of: Web/API/Push_API
+---
+<div>{{DefaultAPISidebar("Push API")}}{{SeeCompatTable}}</div>
+
+<p><strong>API Push</strong> memberikan aplikasi web kemampuan menerima pesan yang didorong oleh peladen ke dalam agen pengguna, baik bila aplikasi berada di permukaan atau baru dimuat. API Push memungkinkan pengembang memberikan pemberitahuan dan pembaruan tak sinkron ke pengguna yang mengizinkan. Hal ini memberikan hasil pendekatan yang lebih baik untuk muatan baru yang terus berubah.</p>
+
+<div class="note">
+<p><strong>Catatan</strong>: Dokumentasi ini melingkupi spesifikasi API Push W3C. Bila Anda mencari dokumentasi untuk mekanisme berpemilik dari Firefox OS, lihat <a href="/id/docs/Web/API/Simple_Push_API">Push Sederhana</a>.</p>
+</div>
+
+<h2 id="Push_concepts_and_usage">Push concepts and usage</h2>
+
+<p>For an app to receive push messages, it has to have an active <a href="/en-US/docs/Web/API/ServiceWorker_API">service worker</a>. When the service worker is active, it can subscribe to push notifications using {{domxref("PushManager.subscribe()")}}.</p>
+
+<p>The resulting {{domxref("PushSubscription")}} includes all the information that the application needs to send a push message: an endpoint and the encryption key needed for sending data.</p>
+
+<p>The service worker will be started as necessary to handle incoming push messages, which are delivered to the {{domxref("ServiceWorkerGlobalScope.onpush")}} event handler. This allows apps to react to push messages being received, for example by displaying a notification (using {{domxref("ServiceWorkerRegistration.showNotification()")}}.)</p>
+
+<p>Each subscription is unique to a service worker.  The endpoint for the subscription is a unique <a href="http://www.w3.org/TR/capability-urls/">capability URL</a>: knowledge of the endpoint is all that is necessary to send a message to your application. The endpoint URL therefore needs to be kept secret, or other applications might be able to send push messages to your application.</p>
+
+<p>Activating a service worker to deliver a push message can result in increased resource usage, particularly of the battery. Different browsers have different schemes for handling this — there is currently no standard mechanism. Firefox allows a limited number (quota) of push messages to be sent to an application, although Push messages that generate notifications are exempt from this limit. The limit is refreshed each time the site is visited. In comparison, Chrome applies no limit but requires that every push message causes a notification to be displayed.</p>
+
+<div class="note">
+<p><strong>Note</strong>: As of Gecko 44, the allowed quota of push messages per application is not incremented when a new notification fires when another is still visible, for a period of three seconds. This handles cases where a burst of notifications is received, and not all generate a visible notification.</p>
+</div>
+
+<div class="note">
+<p><strong>Note</strong>: Chrome currently requires you to set up a project on <a href="https://developers.google.com/cloud-messaging/">Google Cloud Messaging</a> to send push messages, and use the associated project number and API key when sending push notifications. It also requires an app manifest with some special parameters to use this service. This restriction will hopefully be removed in the future.</p>
+</div>
+
+<h2 id="Interfaces">Interfaces</h2>
+
+<dl>
+ <dt>{{domxref("PushEvent")}}</dt>
+ <dd>Represents a push action sent to the <a href="/en-US/docs/Web/API/ServiceWorkerGlobalScope">global scope</a> of a {{domxref("ServiceWorker")}}. It contains information sent from an application to a {{domxref("PushSubscription")}}.</dd>
+ <dt>{{domxref("PushManager")}}</dt>
+ <dd>Provides a way to receive notifications from third-party servers as well as request URLs for push notifications. This interface has replaced functionality offered by the obsolete {{domxref("PushRegistrationManager")}} interface.</dd>
+ <dt>{{domxref("PushMessageData")}}</dt>
+ <dd>Provides access to push data sent by a server, and includes methods to manipulate the received data.</dd>
+ <dt>{{domxref("PushSubscription")}}</dt>
+ <dd>Provides a subcription's URL endpoint and allows unsubscription from a push service.</dd>
+</dl>
+
+<h2 id="Service_worker_additions">Service worker additions</h2>
+
+<p>The following additions to the <a href="/en-US/docs/Web/API/Service_Worker_API">Service Worker API</a> have been specified in the Push API spec, to provide an entry point for using Push messages, and  to monitor and respond to push and subscription change events.</p>
+
+<dl>
+ <dt>{{domxref("ServiceWorkerRegistration.pushManager")}} {{readonlyinline}}</dt>
+ <dd>Returns a reference to the {{domxref("PushManager")}} interface for managing push subscriptions including subscribing, getting an active subscription, and accessing push permission status. This is the entry point into using Push messaging.</dd>
+ <dt>{{domxref("ServiceWorkerGlobalScope.onpush")}}</dt>
+ <dd>An event handler fired whenever a {{Event("push")}} event occurs; that is, whenever a server push message is received.</dd>
+ <dt>{{domxref("ServiceWorkerGlobalScope.onpushsubscriptionchange")}}</dt>
+ <dd>An event handler fired whenever a {{Event("pushsubscriptionchange")}} event occurs; for example, when a push subscription has been invalidated, or is about to be invalidated (e.g. when a push service sets an expiration time.)</dd>
+</dl>
+
+<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("Push API")}}</td>
+   <td>{{Spec2("Push API")}}</td>
+   <td>Initial definition</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_Compatibility">Browser Compatibility</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}}<sup>[2]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+  <tr>
+   <td>{{domxref("PushEvent.data")}},<br>
+    {{domxref("PushMessageData")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoDesktop(44.0)}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</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>Android Webview</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>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}<sup>[2]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatChrome(42.0)}}</td>
+  </tr>
+  <tr>
+   <td>{{domxref("PushEvent.data")}},<br>
+    {{domxref("PushMessageData")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<p>[1] Currently available only on desktop versions of Firefox; also, push messages are only delivered when Firefox is running.</p>
+
+<p>[2] This is currently not implemented. See the <a href="https://dev.modern.ie/platform/status/pushapi/">Microsoft Edge status information</a>.</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/Push_API/Using_the_Push_API">Using the Push API</a></li>
+ <li><a href="https://github.com/chrisdavidmills/push-api-demo">Push API Demo</a>, on Github</li>
+ <li><a href="http://updates.html5rocks.com/2015/03/push-notificatons-on-the-open-web">Push Notifications on the Open Web</a>, Matt Gaunt</li>
+ <li><a href="/en-US/docs/Web/API/Service_Worker_API">Service Worker API</a></li>
+</ul>