From da78a9e329e272dedb2400b79a3bdeebff387d47 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:42:17 -0500
Subject: initial commit

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+---
+title: PushMessageData
+slug: Web/API/PushMessageData
+translation_of: Web/API/PushMessageData
+---
+<p>{{APIRef("Push API")}}{{SeeCompatTable()}}</p>
+
+<p>The <code><strong>PushMessageData</strong></code> interface of the <a href="/en-US/docs/Web/API/Push_API">Push API</a> provides methods which let you retrieve the push data sent by a server in various formats.</p>
+
+<p>Unlike the similar methods in the <a href="/en-US/docs/Web/API/Fetch_API">Fetch API</a>, which only allow the method to be invoked once, these methods can be called multiple times.</p>
+
+<p>Messages received through the Push API are sent encrypted by push services and then automatically decrypted by browsers before they are made accessible through the methods of the <code>PushMessageData</code> interface.</p>
+
+<h2 id="Properties">Properties</h2>
+
+<p>None.</p>
+
+<h2 id="Methods">Methods</h2>
+
+<dl>
+ <dt>{{domxref("PushMessageData.arrayBuffer()")}}</dt>
+ <dd>Extracts the data as an {{domxref("ArrayBuffer")}} object.</dd>
+ <dt>{{domxref("PushMessageData.blob()")}}</dt>
+ <dd>Extracts the data as a {{domxref("Blob")}} object.</dd>
+ <dt>{{domxref("PushMessageData.json()")}}</dt>
+ <dd>Extracts the data as a <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON">JSON</a> object.</dd>
+ <dt>{{domxref("PushMessageData.text()")}}</dt>
+ <dd>Extracts the data as a plain text string.</dd>
+</dl>
+
+<h2 id="Examples">Examples</h2>
+
+<pre class="brush: js">self.addEventListener('push', function(event) {
+  var obj = event.data.json();
+
+  if(obj.action === 'subscribe' || obj.action === 'unsubscribe') {
+    fireNotification(obj, event);
+    port.postMessage(obj);
+  } else if(obj.action === 'init' || obj.action === 'chatMsg') {
+    port.postMessage(obj);
+  }
+});</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('Push API', '#pushmessagedata-interface', 'PushMessageData')}}</td>
+   <td>{{Spec2('Push API')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<div>
+
+
+<p>{{Compat("api.PushMessageData")}}</p>
+</div>
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