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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>
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