---
title: RegExp.prototype
slug: conflicting/Web/JavaScript/Reference/Global_Objects/RegExp
tags:
  - JavaScript
  - Property
  - RegExp
translation_of: Web/JavaScript/Reference/Global_Objects/RegExp
translation_of_original: Web/JavaScript/Reference/Global_Objects/RegExp/prototype
original_slug: Web/JavaScript/Reference/Global_Objects/RegExp/prototype
---
<p>{{JSRef("Global_Objects", "RegExp")}}</p>
<h2 id="Summary" name="Summary">概述</h2>
<p><font face="Courier New, Andale Mono, monospace">RegExp.prototype 属性表示 </font><span style="line-height: 1.5;">{{jsxref("Global_Objects/RegExp", "RegExp")}} </span><span style="font-family: 'Courier New', 'Andale Mono', monospace; line-height: 1.5;">构造函数的原型对象。</span></p>
<h2 id="Description" name="Description">描述</h2>
<p>查看<font face="Courier New, Andale Mono, monospace"> </font><span style="line-height: 1.5;">{{jsxref("Global_Objects/RegExp", "RegExp")}} </span><span style="line-height: 1.5;">了解更多关于 </span><code style="font-style: normal; line-height: 1.5;">RegExp</code> <code style="font-style: normal; line-height: 1.5;">实例的说明。</code></p>
<p><code>RegExp</code> 实例继承 <code>RegExp.prototype</code>。修改该原型对象上的属性或方法会影响到所有的 <code>RegExp</code> <code>实例。</code></p>
<h2 id="Properties" name="Properties">属性</h2>
<p>查看<a href="/zh-CN/docs/JavaScript/Reference/Deprecated_Features#RegExp_Properties" title="zh-CN/docs/JavaScript/Reference/Deprecated_Features#RegExp_Properties">已废弃的RegExp属性</a></p>
<p>注意，<code>RegExp</code> 对象的几个属性既有完整的长属性名，也有对应的类 Perl 的短属性名。两个属性都有着同样的值。JavaScript 的正则语法就是基于 Perl 的。</p>
<dl>
 <dt>
  <code style="font-style: normal; font-weight: bold;">RegExp.prototype.</code><code style="font-style: normal; font-weight: bold;">constructor</code></dt>
 <dd>
  创建该正则对象的构造函数。</dd>
 <dt>
  {{jsxref("RegExp.prototype.global")}}</dt>
 <dd>
  是否开启全局匹配，也就是匹配目标字符串中所有可能的匹配项，而不是只进行第一次匹配。</dd>
 <dt>
  {{jsxref("RegExp.prototype.ignoreCase")}}</dt>
 <dd>
  在匹配字符串时是否要忽略字符的大小写。</dd>
 <dt>
  {{jsxref("RegExp.prototype.lastIndex")}}</dt>
 <dd>
  下次匹配开始的字符串索引位置。</dd>
 <dt>
  {{jsxref("RegExp.prototype.multiline")}}</dt>
 <dd>
  是否开启多行模式匹配（影响 ^ 和 $ 的行为）。</dd>
 <dt>
  {{jsxref("RegExp.prototype.source")}}</dt>
 <dd>
  正则对象的源模式文本。</dd>
 <dt>
  {{jsxref("RegExp.prototype.sticky")}} {{experimental_inline}}</dt>
 <dd>
  是否开启粘滞匹配。</dd>
</dl>
<div>
 {{ jsOverrides("Object", "properties", "constructor", "global", "ignoreCase", "lastIndex", "multiline", "source", "sticky") }}</div>
<h2 id="Methods" name="Methods">方法</h2>
<p>查看<a href="/zh-CN/docs/JavaScript/Reference/Deprecated_Features#RegExp_Methods" title="zh-CN/docs/JavaScript/Reference/Deprecated_Features#RegExp_Methods">已废弃的RegExp方法</a></p>
<dl>
 <dt>
  {{jsxref("RegExp.prototype.exec()")}}</dt>
 <dd>
  在目标字符串中执行一次正则匹配操作。</dd>
 <dt>
  {{jsxref("RegExp.prototype.test()")}}</dt>
 <dd>
  测试当前正则是否能匹配目标字符串。</dd>
 <dt>
  {{jsxref("RegExp.prototype.toSource()")}} {{non-standard_inline}}</dt>
 <dd>
  返回一个字符串，其值为该正则对象的字面量形式。覆盖了<code>Object.prototype.toSource</code> 方法.</dd>
 <dt>
  {{jsxref("RegExp.prototype.toString()")}}</dt>
 <dd>
  返回一个字符串，其值为该正则对象的字面量形式。覆盖了{{jsxref("Object.prototype.toString()")}} 方法。</dd>
</dl>
<div>
 {{ jsOverrides("Object", "Methods", "exec", "test", "toSource", "toString") }}</div>
<h2 id="规范" style="margin-bottom: 20px; line-height: 30px;">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>ECMAScript 1st Edition. Implemented in JavaScript 1.1</td>
   <td>Standard</td>
   <td>Initial definition.</td>
  </tr>
  <tr>
   <td>{{SpecName('ES5.1', '#sec-15.10.5.1', 'RegExp')}}</td>
   <td>{{Spec2('ES5.1')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ES6', '#sec-regexp.prototype', 'RegExp.prototype')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>
<h2 id="浏览器兼容性" style="margin-bottom: 20px; line-height: 30px;">浏览器兼容性</h2>
<p>{{ CompatibilityTable() }}</p>
<div id="compat-desktop">
 <table class="compat-table">
  <tbody>
   <tr>
    <th style="line-height: 16px;">Feature</th>
    <th style="line-height: 16px;">Chrome</th>
    <th style="line-height: 16px;">Firefox (Gecko)</th>
    <th style="line-height: 16px;">Internet Explorer</th>
    <th style="line-height: 16px;">Opera</th>
    <th style="line-height: 16px;">Safari</th>
   </tr>
   <tr>
    <td>Basic support</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
   </tr>
  </tbody>
 </table>
</div>
<div id="compat-mobile">
 <table class="compat-table">
  <tbody>
   <tr>
    <th style="line-height: 16px;">Feature</th>
    <th style="line-height: 16px;">Android</th>
    <th style="line-height: 16px;">Chrome for Android</th>
    <th style="line-height: 16px;">Firefox Mobile (Gecko)</th>
    <th style="line-height: 16px;">IE Mobile</th>
    <th style="line-height: 16px;">Opera Mobile</th>
    <th style="line-height: 16px;">Safari Mobile</th>
   </tr>
   <tr>
    <td>Basic support</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
    <td>{{ CompatVersionUnknown() }}</td>
   </tr>
  </tbody>
 </table>
</div>
<h2 id="相关链接" style="margin-bottom: 20px; line-height: 30px;">相关链接</h2>
<ul>
 <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions" title="JavaScript/Guide/Regular_Expressions">Regular Expressions</a> chapter in the <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide" title="JavaScript/Guide">JavaScript Guide</a></li>
 <li>{{jsxref("Global_Objects/RegExp", "RegExp")}}</li>
 <li>{{jsxref("Function.prototype")}}</li>
</ul>
<p> </p>