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---
title: Symbol.search
slug: Web/JavaScript/Reference/Global_Objects/Symbol/search
translation_of: Web/JavaScript/Reference/Global_Objects/Symbol/search
---
<div>{{JSRef}}</div>



<p><code>Symbol.search 指定了一个搜索方法,这个方法接受用户输入的正则表达式,返回该正则表达式在字符串中匹配到的下标,这个方法由以下的方法来调用 </code>{{jsxref("String.prototype.search()")}}</p>

<p>更多信息请参见 {{jsxref("RegExp.@@search", "RegExp.prototype[@@search]()")}}{{jsxref("String.prototype.search()")}}.</p>

<div>{{js_property_attributes(0,0,0)}}</div>

<h2 id="案例">案例</h2>

<h3 id="自定义字符串搜索">自定义字符串搜索</h3>

<pre>class caseInsensitiveSearch {
  constructor(value) {
    this.value = value.toLowerCase();
  }
  [Symbol.search](string) {
    return string.toLowerCase().indexOf(this.value);
  }
}

console.log('foobar'.search(new caseInsensitiveSearch('BaR')));
// expected output: 3</pre>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('ES2015', '#sec-symbol.search', 'Symbol.search')}}</td>
   <td>{{Spec2('ES2015')}}</td>
   <td>规范中定义的几个部分</td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-symbol.search', 'Symbol.search')}}</td>
   <td>{{Spec2('ESDraft')}}</td>
   <td></td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

{{Compat}}

<h2 id="参见">参见</h2>

<ul>
 <li>{{jsxref("Symbol.match")}}</li>
 <li>{{jsxref("Symbol.replace")}}</li>
 <li>{{jsxref("Symbol.split")}}</li>
 <li>{{jsxref("RegExp.@@search", "RegExp.prototype[@@search]()")}}</li>
</ul>