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+---
+title: BigInt.prototype.valueOf()
+slug: Web/JavaScript/Reference/Global_Objects/BigInt/valueOf
+translation_of: Web/JavaScript/Reference/Global_Objects/BigInt/valueOf
+---
+<div>{{JSRef}}</div>
+
+<p><strong><code>valueOf()</code></strong> 方法返回 {{jsxref("BigInt")}} 对象包装的原始值。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/bigint-valueof.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><var>bigIntObj</var>.valueOf()</pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>表示指定 {{jsxref("BigInt")}} 对象的原始 BigInt 值。</p>
+
+<h2 id="例子">例子</h2>
+
+<h3 id="Using_valueOf">Using <code>valueOf</code></h3>
+
+<pre class="brush: js">typeof Object(1n); // object
+typeof Object(1n).valueOf(); // bigint
+</pre>
+
+<h2 id="标准">标准</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-bigint.prototype.valueof', 'BigInt.prototype.valueOf()')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器支持">浏览器支持</h2>
+
+<p class="hidden">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.BigInt.valueOf")}}</p>
+
+<h2 id="请参阅">请参阅</h2>
+
+<ul>
+ <li>{{jsxref("BigInt.prototype.toString()")}}</li>
+</ul>