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: TimeRanges.length
+slug: Web/API/TimeRanges/length
+tags:
+  - API
+  - HTML DOM
+  - Media
+  - Property
+  - Read-only
+  - Reference
+  - TimeRanges
+translation_of: Web/API/TimeRanges/length
+---
+<div>{{APIRef("DOM")}}</div>
+
+<p><span class="seoSummary"><strong><code>TimeRanges.length</code></strong> 読み取り専用プロパティは、オブジェクト内の範囲の数を返します。</span><br>
+  </p>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox"><em>length</em> = <em>TimeRanges</em>.length;
+</pre>
+
+<h2 id="Example" name="Example">例</h2>
+
+<p>ID が "myVideo" の動画要素がある場合、</p>
+
+<pre class="brush: js">var v = document.GetElementById("myVideo");
+
+var buf = v.buffered;
+
+var numRanges = buf.length;
+
+if (buf.length == 1) {
+  // 1つの範囲のみ
+  if (buf.start(0) == 0 &amp;&amp; buf.end(0) == v.duration) {
+    // 1つの範囲が動画の最初から始まり、
+    // 動画の最後で終わるため、すべてが読み込まれています
+  }
+}
+</pre>
+
+<p>この例では、時間範囲を見て、動画全体が読み込まれたかどうかを確認します。</p>
+
+<h2 id="Specifications" name="Specifications">仕様</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">仕様</th>
+   <th scope="col">状態</th>
+   <th scope="col">コメント</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName("HTML WHATWG", "#dom-timeranges-length", "TimeRanges.length()")}}</td>
+   <td>{{Spec2("HTML WHATWG")}}</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.TimeRanges.length")}}</p>
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