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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>
<div></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]()")}} 和{{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="notranslate">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>
<p>{{CompatibilityTable}}</p>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
</tr>
<tr>
<td>基本支持</td>
<td>{{CompatChrome(50)}}</td>
<td>{{ CompatGeckoDesktop(49) }}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Chrome for Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>基本支持</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{ CompatGeckoMobile(49) }}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<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>
|
