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---
title: WritableStreamDefaultWriter.releaseLock()
slug: Web/API/WritableStreamDefaultWriter/releaseLock
tags:
- API
- Experimental
- Method
- Reference
- Streams
- WritiableStream
- releaseLock
translation_of: Web/API/WritableStreamDefaultWriter/releaseLock
---
<p>{{APIRef("Streams")}}{{SeeCompatTable}}{{draft}}</p>
<p>{{domxref("WritableStreamDefaultWriter")}} インターフェイスの <span class="seoSummary"><strong><code>releaseLock()</code></strong> メソッドは、対応するストリームのライターのロックを解除します。 ロックを解除すると、ライターはアクティブではなくなります。 ロックを解除したときに関連するストリームにエラーが発生した場合、ライターはこれ以降同じようにエラーが発生したように見えます。 そうでない場合、ライターは閉じられたように見えます。</span></p>
<h2 id="構文">構文</h2>
<pre class="syntaxbox"><em>writableStreamDefaultWritere</em>.releaseLock()</pre>
<h3 id="パラメーター">パラメーター</h3>
<p>なし。</p>
<h3 id="戻り値">戻り値</h3>
<p><code>undefined</code>。</p>
<h2 id="例">例</h2>
<pre class="brush: js line-numbers language-js"><code class="language-js"><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="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>
<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> queuingStrategy<span class="punctuation token">)</span><span class="punctuation token">;</span>
<span class="punctuation token">.</span><span class="punctuation token">.</span><span class="punctuation token">.
const writer = writableStream.getWriter();
...</span>
<span class="comment token">// 必要に応じて、ストリームのライターのロックを解除します</span>
writer<span class="punctuation token">.</span><span class="punctuation token">releaseLock();</span></code></pre>
<h2 id="仕様">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','#default-reader-release-lock','releaseLock()')}}</td>
<td>{{Spec2('Streams')}}</td>
<td>初期定義</td>
</tr>
</tbody>
</table>
<h2 id="ブラウザーの互換性">ブラウザーの互換性</h2>
<p>{{Compat("api.WritableStreamDefaultWriter.releaseLock")}}</p>
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