---
title: decodeURIComponent()
slug: Web/JavaScript/Reference/Global_Objects/decodeURIComponent
tags:
  - JavaScript
  - URI
  - 统一资源标识符
  - 解码
translation_of: Web/JavaScript/Reference/Global_Objects/decodeURIComponent
---
<div>{{jsSidebar("Objects")}}</div>

<p><code><strong>decodeURIComponent()</strong></code> 方法用于解码由 {{jsxref("encodeURIComponent")}} 方法或者其它类似方法编码的部分统一资源标识符（URI）。</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox"><code>decodeURIComponent(<em>encodedURI</em>)</code></pre>

<h3 id="参数">参数</h3>

<dl>
 <dt><code>encodedURI</code></dt>
 <dd>编码后的部分 URI</dd>
</dl>

<h3 id="返回值">返回值</h3>

<p><span class="tlid-translation translation" lang="zh-CN"><span title="">一个解码后的统一资源标识符（URI）字符串，处理前的URI经过了给定格式的编码。</span></span></p>

<h3 id="异常">异常</h3>

<p>当该方法使用不当时，将会抛出一个{{jsxref("URIError")}}（<span class="tlid-translation translation" lang="zh-CN"><span title="">“</span></span><span class="tlid-translation translation" lang="zh-CN"><span title="">格式错误的URI序列</span></span><span class="tlid-translation translation" lang="zh-CN"><span title="">”</span></span>）异常。</p>

<h2 id="描述">描述</h2>

<p>将已编码 URI 中所有能识别的转义序列转换成原字符。</p>

<h2 id="示例">示例</h2>

<h3 id="解码一个西里尔字母的URL">解码一个西里尔字母的URL</h3>

<pre class="brush: js">decodeURIComponent("JavaScript_%D1%88%D0%B5%D0%BB%D0%BB%D1%8B");
// "JavaScript_шеллы"
</pre>

<h3 id="捕捉异常">捕捉异常</h3>

<pre class="brush: js">try {
  var a = decodeURIComponent('%E0%A4%A');
} catch(e) {
  console.error(e);
}

// URIError: malformed URI sequence</pre>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">规范</th>
   <th scope="col">状态</th>
   <th scope="col">备注</th>
  </tr>
  <tr>
   <td>{{SpecName('ES3')}}</td>
   <td>{{Spec2('ES3')}}</td>
   <td>初始定义</td>
  </tr>
  <tr>
   <td>{{SpecName('ES5.1', '#sec-15.1.3.2', 'decodeURIComponent')}}</td>
   <td>{{Spec2('ES5.1')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ES6', '#sec-decodeuricomponent-encodeduricomponent', 'decodeURIComponent')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-decodeuricomponent-encodeduricomponent', 'decodeURIComponent')}}</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>特性</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>基础功能</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>特性</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>基础功能</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">相关链接</h2>

<ul>
 <li>{{jsxref("decodeURI")}}</li>
 <li>{{jsxref("encodeURI")}}</li>
 <li>{{jsxref("encodeURIComponent")}}</li>
</ul>

<p>
 <audio class="hidden"> </audio>
</p>