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+---
+title: SourceBufferList.length
+slug: Web/API/SourceBufferList/length
+tags:
+  - API
+  - Audio
+  - MSE
+  - Media Source Extensions
+  - Property
+  - Reference
+  - SourceBufferList
+  - Video
+  - length
+translation_of: Web/API/SourceBufferList/length
+---
+<div>{{draft}}{{APIRef("Media Source Extensions")}}{{SeeCompatTable}}</div>
+
+<p>{{domxref("SourceBufferList")}} インターフェイスの <strong><code>length</code></strong> 読み取り専用プロパティは、リスト内の {{domxref("SourceBuffer")}} オブジェクトの数を返します。</p>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox">var <em>myListLength</em> = <em>sourceBufferList</em>.length;</pre>
+
+<h3 id="Value" name="Value">値</h3>
+
+<p>unsigned long 型の数。</p>
+
+<h2 id="Example" name="Example">例</h2>
+
+<p>未定</p>
+
+<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('Media Source Extensions', '#idl-def-sourcebufferlist-length', 'length')}}</td>
+   <td>{{Spec2('Media Source Extensions')}}</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>
+
+
+
+<p>{{Compat("api.SourceBufferList.length")}}</p>
+
+<h2 id="See_also" name="See_also">関連情報</h2>
+
+<ul>
+ <li>{{domxref("MediaSource")}}</li>
+ <li>{{domxref("SourceBuffer")}}</li>
+</ul>