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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: ExtendableMessageEvent.origin
+slug: Web/API/ExtendableMessageEvent/origin
+tags:
+ - API
+ - ExtendableMessageEvent
+ - Property
+ - Reference
+ - Service Workers
+ - origin
+translation_of: Web/API/ExtendableMessageEvent/origin
+---
+<p>{{APIRef("Service Workers API")}}</p>
+
+<p>{{domxref("ExtendableMessageEvent")}} インターフェイスの <strong><code>origin</code></strong> 読み取り専用プロパティは、メッセージを送信した {{domxref("Client")}} のオリジンを返します。</p>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox notranslate">var <em>myOrigin</em> = <em>extendableMessageEvent</em>.origin;</pre>
+
+<h3 id="Value" name="Value">値</h3>
+
+<p>{{domxref("USVString")}}。</p>
+
+<h2 id="Examples" name="Examples">例</h2>
+
+<p>次のコードをサービスワーカー内で使用して、{{domxref("PushMessageData")}} を介して受信したデータを<a href="/ja/docs/Web/API/Channel_Messaging_API">チャンネルメッセージ</a>を介してメインコンテキストに送信することにより、プッシュメッセージに応答する場合、<code>onmessage</code> のイベントオブジェクトは <code>ExtendableMessageEvent</code> になります。</p>
+
+<pre class="brush: js notranslate">var port;
+
+self.addEventListener('push', function(e) {
+ var obj = e.data.json();
+
+ if(obj.action === 'subscribe' || obj.action === 'unsubscribe') {
+ port.postMessage(obj);
+ } else if(obj.action === 'init' || obj.action === 'chatMsg') {
+ port.postMessage(obj);
+ }
+});
+
+self.onmessage = function(e) {
+ console.log(e.origin);
+ port = e.ports[0];
+}
+</pre>
+
+<h2 id="Specifications" name="Specifications">仕様</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">仕様</th>
+ <th scope="col">状態</th>
+ <th scope="col">コメント</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('Service Workers', '#dom-extendablemessageevent-origin', 'ExtendableMessageEvent.origin')}}</td>
+ <td>{{Spec2('Service Workers')}}</td>
+ <td>初期定義</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">ブラウザーの互換性</h2>
+
+<div>
+
+
+<p>{{Compat("api.ExtendableMessageEvent.origin")}}</p>
+</div>
+
+<h2 id="See_also" name="See_also">関連情報</h2>
+
+<ul>
+ <li><a href="/ja/docs/Web/API/Service_Worker_API/Using_Service_Workers">Service worker の使用</a></li>
+ <li><a class="external external-icon" href="https://github.com/mdn/sw-test">サービスワーカーの基本的なコード例</a>(英語)</li>
+ <li><a class="external external-icon" href="https://jakearchibald.github.io/isserviceworkerready/">ServiceWorker の準備はできていますか?</a>(英語)</li>
+ <li><a href="/ja/docs/Web/API/Channel_Messaging_API">Channel Messaging</a></li>
+</ul>