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authorMDN <actions@users.noreply.github.com>2021-05-05 00:31:00 +0000
committerMDN <actions@users.noreply.github.com>2021-05-05 00:31:00 +0000
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+---
+title: WeakSet.prototype.clear()
+slug: orphaned/Web/JavaScript/Reference/Global_Objects/WeakSet/clear
+tags:
+ - JavaScript
+ - Method
+ - Obsolute
+ - Prototype
+ - WeakSet
+translation_of: Web/JavaScript/Reference/Global_Objects/WeakSet/clear
+original_slug: Web/JavaScript/Reference/Global_Objects/WeakSet/clear
+---
+<div>{{JSRef("Global_Objects", "WeakSet")}} {{obsolete_header}}</div>
+
+<h2 id="Summary" name="Summary">概要</h2>
+
+<p><code>WeakSet</code>オブジェクトからすべての要素を削除します。</p>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox"><code><em>ws</em>.clear();</code></pre>
+
+<h2 id="Examples" name="Examples">例</h2>
+
+<h3 id="Example:_Testing_size_of_all_array_elements" name="Example:_Testing_size_of_all_array_elements">例: <code>clear</code> メソッドを使う</h3>
+
+<pre class="brush: js">var ws = new WeakSet();
+
+ws.add(window);
+ws.has(window); // true
+
+ws.clear();
+
+ws.has(window); // false
+</pre>
+
+<h2 id="仕様">仕様</h2>
+
+<p>すべての現在の標準やドラフトでサポートされていません。このメソッドは、リビジョン 28 (October 14, 2014のバージョン)までECMAScript第6版ドラフト仕様でサポートされました。しかし、最新バージョンのドラフトで削除されました。最終仕様では、サポートされていません。</p>
+
+<h2 id="ブラウザ実装状況">ブラウザ実装状況</h2>
+
+<p>{{Compat("javascript.builtins.WeakSet.clear")}}</p>
+
+<h2 id="関連情報">関連情報</h2>
+
+<ul>
+ <li>{{jsxref("WeakSet")}}</li>
+ <li>{{jsxref("WeakSet.prototype.delete()")}}</li>
+</ul>