--- 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>