diff --git a/Cache/LRUCache.js b/Cache/LRUCache.js
index d524bcbaec..7682a04de1 100644
--- a/Cache/LRUCache.js
+++ b/Cache/LRUCache.js
@@ -83,6 +83,11 @@ class LRUCache {
 this.cache.set(key, value)
 }
 
+ clear () {
+ this.cache.clear()
+ return this
+ }
+
 /**
 * @param {string} key
 * @returns {*}
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/TheAlgorithms/JavaScript/pull/984.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/TheAlgorithms/JavaScript/pull/984.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>