From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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+---
+title: MIDIConnectionEvent
+slug: Web/API/MIDIConnectionEvent
+tags:
+  - API
+  - Draft
+  - MIDI
+  - 接口
+translation_of: Web/API/MIDIConnectionEvent
+---
+<p>{{APIRef("Web MIDI API")}}{{SeeCompatTable}}</p>
+
+<p>The <strong><code>MIDIConnectionEvent</code></strong> interface of the <a href="/en-US/docs/Web/API/Web_MIDI_API">Web MIDI API</a> is the event passed to the {{domxref("MIDIAccess.onstatechange","onstatechange")}} event of the {{domxref("MIDIAccess")}} interface and the {{domxref("MIDIPorts.onstatechange","onstatechange")}} event of the {{domxref("MIDIPorts")}} interface. This occurs any time a new port becomes available, or when a previously available port becomes unavailable. 例如，这个事件无论是在一个 MIDI 设备插入或拔出设备时都会触发。</p>
+
+<h2 id="构造函数">构造函数</h2>
+
+<dl>
+ <dt>{{domxref("MIDIConnectionEvent.MIDIConnectionEvent")}}</dt>
+ <dd>创建一个新的 <code>MIDIConnectionEvent</code> 对象。</dd>
+</dl>
+
+<h2 id="属性">属性</h2>
+
+<dl>
+ <dt>{{domxref("MIDIConnectionEvent.port")}}</dt>
+ <dd>返回一个 {{domxref("MIDIPort")}} 实例的引用，指明其端口是否已经连接。</dd>
+</dl>
+
+<h2 id="举例">举例</h2>
+
+<p> </p>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">规范</th>
+   <th scope="col">状态</th>
+   <th scope="col">备注</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('WebMIDI API','#midiconnectionevent-interface')}}</td>
+   <td>{{Spec2('WebMIDI API')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+<div>
+
+
+<p>{{Compat("api.MIDIConnectionEvent")}}</p>
+</div>
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