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---
title: CountQueuingStrategy.size()
slug: Web/API/CountQueuingStrategy/size
tags:
- API
- CountQueuingStrategy
- Experimental
- Method
- Reference
- Streams
- size
translation_of: Web/API/CountQueuingStrategy/size
---
<div>{{draft}}{{SeeCompatTable}}{{APIRef("Streams")}}</div>
<p class="summary"><span class="seoSummary">{{domxref("CountQueuingStrategy")}} インターフェイスの <strong><code>size()</code></strong> メソッドは常に <code>1</code> を返すため、合計キューサイズはキュー内のチャンク数を数えたものになります。</span></p>
<h2 id="Syntax" name="Syntax">構文</h2>
<pre class="syntaxbox"><var><code>var <em>size</em> = </code>countQueuingStrategy</var>.size();</pre>
<h3 id="Parameters" name="Parameters">パラメーター</h3>
<p>なし。</p>
<h3 id="Return_value" name="Return_value">戻り値</h3>
<p><code>1</code>。</p>
<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> queuingStrategy <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="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="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> queuingStrategy<span class="punctuation token">)</span><span class="punctuation token">;</span>
<span class="keyword token">var</span> size <span class="operator token">=</span> queuingStrategy<span class="punctuation token">.</span><span class="function token">size</span><span class="punctuation token">(</span><span class="punctuation token">)</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-size","size")}}</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>
<p>{{Compat("api.CountQueuingStrategy.size")}}</p>
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