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+---
+title: NetworkInformation.onchange
+slug: Web/API/NetworkInformation/onchange
+tags:
+ - API
+ - Event Handler
+ - Experimental
+ - Network Information API
+ - NetworkInformation
+ - Property
+ - Reference
+translation_of: Web/API/NetworkInformation/onchange
+---
+<p>{{apiref("Network Information API")}}{{SeeCompatTable}}</p>
+
+<p><strong><code>NetworkInformation.onchange</code></strong> イベントハンドラは、接続情報が変化したときに発火し、{{domxref("NetworkInformation")}} オブジェクトが {{event("change")}} を受け取るコードを含みます。</p>
+
+<h2 id="構文">構文</h2>
+
+<pre class="syntaxbox"><em>netInfo</em>.onchange = function() { ... }
+</pre>
+
+<h2 id="例">例</h2>
+
+<pre class="brush: js">// 接続型の取得
+var type = navigator.connection.type;
+
+function changeHandler(e) {
+ // ここで接続型の変更を操作する
+}
+
+// change イベントの登録:
+navigator.connection.onchange = changeHandler;
+
+// Another way: navigator.connection.addEventListener('change', changeHandler);</pre>
+
+<h2 id="仕様">仕様</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">仕様</th>
+ <th scope="col">ステータス</th>
+ <th scope="col">コメント</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{SpecName('Network Information')}}</td>
+ <td>{{Spec2('Network Information')}}</td>
+ <td>最初の定義</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="ブラウザ実装状況">ブラウザ実装状況</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>機能</th>
+ <th>Chrome</th>
+ <th>Firefox (Gecko)</th>
+ <th>Internet Explorer</th>
+ <th>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>基本サポート</td>
+ <td>{{CompatChrome(47)}}</td>
+ <td>{{CompatNo}}</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>機能</th>
+ <th>Android</th>
+ <th>Android Webview</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>IE Mobile</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ <th>Chrome for Android</th>
+ </tr>
+ <tr>
+ <td>基本サポート</td>
+ <td>{{CompatNo}}</td>
+ <td>{{CompatNo}}</td>
+ <td>{{CompatNo}} [1]</td>
+ <td>{{CompatNo}}</td>
+ <td>{{CompatNo}}</td>
+ <td>{{CompatNo}}</td>
+ <td>{{CompatNo}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<p>[1] Firefox では、イベントハンドラで送信される <code>typechange</code> イベントは、<code>ontypechange</code> です。</p>