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+---
+title: CountQueuingStrategy
+slug: Web/API/CountQueuingStrategy
+tags:
+  - API
+  - CountQueuingStrategy
+  - Experimental
+  - Interface
+  - Reference
+  - Streams
+translation_of: Web/API/CountQueuingStrategy
+---
+<p>{{SeeCompatTable}}{{APIRef("Streams")}}</p>
+
+<p><span class="seoSummary"><a href="/ja/docs/Web/API/Streams_API">Streams API</a> の <strong><code>CountQueuingStrategy</code></strong> インターフェイスは、ストリームの構築時に使用できる組み込みのチャンクカウントキューイング戦略を提供します。</span></p>
+
+<h2 id="Constructor" name="Constructor">コンストラクター</h2>
+
+<dl>
+ <dt>{{domxref("CountQueuingStrategy.CountQueuingStrategy", "CountQueuingStrategy()")}}</dt>
+ <dd>新しい <code>CountQueuingStrategy</code> オブジェクトのインスタンスを作成します。</dd>
+</dl>
+
+<h2 id="Properties" name="Properties">プロパティ</h2>
+
+<p>なし。</p>
+
+<h2 id="Methods" name="Methods">メソッド</h2>
+
+<dl>
+ <dt>{{domxref("CountQueuingStrategy.size()")}}</dt>
+ <dd><code>1</code> を返します。</dd>
+</dl>
+
+<h2 id="Examples" name="Examples">例</h2>
+
+<pre class="brush: js line-numbers  language-js"><code class="language-js"><span class="keyword token">const</span> queueingStrategy <span class="operator token">=</span> <span class="keyword token">new</span> <span class="class-name token">CountQueuingStrategy</span><span class="punctuation token">(</span><span class="punctuation token">{</span> highWaterMark<span class="punctuation token">:</span> <span class="number token">1</span> <span class="punctuation token">}</span><span class="punctuation token">)</span><span class="punctuation token">;</span>
+
+<span class="keyword token">const</span> writableStream <span class="operator token">=</span> <span class="keyword token">new</span> <span class="class-name token">WritableStream</span><span class="punctuation token">(</span><span class="punctuation token">{</span>
+  <span class="comment token">// シンクの実装</span>
+  <span class="function token">write</span><span class="punctuation token">(</span>chunk<span class="punctuation token">)</span> <span class="punctuation token">{</span>
+    <span class="punctuation token">...</span>
+  <span class="punctuation token">}</span><span class="punctuation token">,</span>
+  <span class="function token">close</span><span class="punctuation token">(</span><span class="punctuation token">)</span> <span class="punctuation token">{</span>
+    ...
+  <span class="punctuation token">}</span><span class="punctuation token">,</span>
+  <span class="function token">abort</span><span class="punctuation token">(</span>err<span class="punctuation token">)</span> <span class="punctuation token">{</span>
+    console<span class="punctuation token">.</span><span class="function token">log</span><span class="punctuation token">(</span><span class="string token">"Sink error:"</span><span class="punctuation token">,</span> err<span class="punctuation token">)</span><span class="punctuation token">;</span>
+  <span class="punctuation token">}</span>
+<span class="punctuation token">}</span><span class="punctuation token">,</span> queueingStrategy<span class="punctuation token">)</span><span class="punctuation token">;
+
+var size = queueingStrategy.size()</span></code>;
+</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('Streams','#cqs-class','CountQueuingStrategy')}}</td>
+   <td>{{Spec2('Streams')}}</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.CountQueuingStrategy")}}</p>
+</div>