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+---
+title: Number.parseInt()
+slug: Web/JavaScript/Reference/Global_Objects/Number/parseInt
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Method
+  - Number
+translation_of: Web/JavaScript/Reference/Global_Objects/Number/parseInt
+---
+<div>{{JSRef}}</div>
+
+<h2 id="Summary" name="Summary">概述</h2>
+
+<p><strong><code>Number.parseInt()</code></strong> 方法依据指定基数 [ 参数 <strong>radix </strong>的值]，把字符串 [ 参数 <strong>string</strong> 的值] 解析成整数。</p>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox"><code>Number.parseInt(<var>string</var>[, <var>radix</var>])</code>
+</pre>
+
+<h3 id="参数">参数</h3>
+
+<p>{{page("en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt", "Parameters")}} </p>
+
+<p>参数string：要解析的值。 如果此参数不是字符串，则使用ToString抽象操作将其转换为字符串。忽略此参数中的前导空格。<br>
+ 参数radix：一个介于2到36之间的整数，代表字符串的基数(数学数字系统中的基)。小心-这并不是默认为10。</p>
+
+<h3 id="返回值">返回值</h3>
+
+<p>{{page("en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt", "Return value")}}</p>
+
+<p>从给定字符串中解析的整数。如果基数小于11，且第一个非空白字符不能转换为数字，则返回NaN。</p>
+
+<h2 id="描述">描述</h2>
+
+<p>这个方法和全局的 {{jsxref("parseInt", "parseInt()")}} 函数具有一样的函数功能:</p>
+
+<pre><code>Number.parseInt === parseInt; // true</code></pre>
+
+<p>ECMAScript 2015添加了这部分 (其目的是对全局变量进行模块化). 请另见 {{jsxref("parseInt", "parseInt()")}} 获取更多详情和示例.</p>
+
+<h2 id="Polyfill">Polyfill</h2>
+
+<pre><code>if (Number.parseInt === undefined) {
+    Number.parseInt = window.parseInt;
+}</code></pre>
+
+<h2 id="说明">说明</h2>
+
+<table>
+ <tbody>
+  <tr>
+   <th scope="col">说明</th>
+   <th scope="col">状态</th>
+   <th scope="col">评论</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES2015', '#sec-number.parseint', 'Number.parseInt')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>初始定义.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-number.parseint', 'Number.parseInt')}}</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>The compatibility table in 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.</p>
+
+<p>{{Compat("javascript.builtins.Number.parseInt")}}</p>
+
+<h2 id="See_also" name="See_also">相关链接</h2>
+
+<ul>
+ <li><code>{{jsxref("Global_Objects/Number", "Number()")}}</code></li>
+ <li>全局的 {{jsxref("Global_Objects/parseInt", "parseInt()")}} 函数</li>
+</ul>