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+---
+title: unescape()
+slug: Web/JavaScript/Reference/Global_Objects/unescape
+tags:
+  - JavaScript
+translation_of: Web/JavaScript/Reference/Global_Objects/unescape
+---
+<div>{{jsSidebar("Objects")}}</div>
+
+<p><font face="Open Sans, Arial, sans-serif">已废弃的</font><code><strong>unescape()</strong></code> 方法计算生成一个新的字符串，其中的十六进制转义序列将被其表示的字符替换。上述的转义序列就像{{jsxref("escape")}}里介绍的一样。因为 <code>unescape</code> 已经废弃，建议使用 {{jsxref("decodeURI")}}或者{{jsxref("decodeURIComponent")}} 替代本方法。</p>
+
+<div class="note"><strong>注意：</strong>不要使用<code>unescape</code>去解码URLS，使用<code>decodeURI</code>替代。</div>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code>unescape(str)</code></pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt><code>str</code></dt>
+ <dd>被编码过的字符串。</dd>
+ <dt>
+ <h3 id="返回值">返回值</h3>
+ </dt>
+ <dd>一个未被转义的新字符串。</dd>
+</dl>
+
+<h2 id="描述">描述</h2>
+
+<p><code>unescape</code>函数是<em>全局对象</em>的一个属性。</p>
+
+<h2 id="示例">示例</h2>
+
+<pre class="brush: js">unescape('abc123');     // "abc123"
+unescape('%E4%F6%FC');  // "äöü"
+unescape('%u0107');     // "ć"
+</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('ES1', '#sec-15.1.2.5', 'unescape')}}</td>
+   <td>{{Spec2('ES1')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES5.1', '#sec-B.2.2', 'unescape')}}</td>
+   <td>{{Spec2('ES5.1')}}</td>
+   <td>Defined in the (informative) Compatibility Annex B</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-unescape-string', 'unescape')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-unescape-string', 'unescape')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td>Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+<div class="hidden">The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</div>
+
+<p>{{Compat("javascript.builtins.unescape")}}</p>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("decodeURI")}}</li>
+ <li>{{jsxref("decodeURIComponent")}}</li>
+ <li>{{jsxref("escape")}}</li>
+</ul>