hysa https://blog.hatena.ne.jp/hysa/ 地球ウォーカー２ https://hysa.hateblo.jp/ JavaScript <input type="text" id="pattern" value="\d" /> <script type="text/javascript"> var p1 = '\d'; var p2 = document.getElementById('pattern').value; console.log('p1 is ' + p1); // → p1 is d console.log('p2 is ' + p2); // → p2 is \d console.log(new RegExp(p1).test(123)); // → false console.log(new RegExp(… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhysa.hateblo.jp%2Fentry%2F20090906%2Fescape" title="Input要素の&lt;code&gt;value&lt;/code&gt; - 地球ウォーカー２" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2009-09-06 00:00:00 rich https://hysa.hateblo.jp/entry/20090906/escape 1.0 100%