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authorMasahiro FUJIMOTO <mfujimot@gmail.com>2021-09-15 22:56:40 +0900
committerGitHub <noreply@github.com>2021-09-15 22:56:40 +0900
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Global_Objects/BigInt を更新 (#2387)
- 2021/07/21 時点の英語版に同期 - `toLocaleString()`, `valueOf()` については新規翻訳
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+---
+title: BigInt.prototype.valueOf()
+slug: Web/JavaScript/Reference/Global_Objects/BigInt/valueOf
+tags:
+ - BigInt
+ - JavaScript
+ - メソッド
+ - プロトタイプ
+ - valueOf()
+browser-compat: javascript.builtins.BigInt.valueOf
+translate_of: Web/JavaScript/Reference/Global_Objects/BigInt/valueOf
+---
+{{JSRef}}
+
+**`valueOf()`** メソッドは、 {{jsxref("BigInt")}} オブジェクトにラップされたプリミティブ値を返します。
+
+{{EmbedInteractiveExample("pages/js/bigint-valueof.html","shorter")}}
+
+## 構文
+
+```js
+bigIntObj.valueOf()
+```
+
+### 返値
+
+指定された {{jsxref("BigInt")}} オブジェクトのプリミティブ値を表す BigInt です。
+
+## 例
+
+### `valueOf` の使用
+
+```js
+typeof Object(1n); // object
+typeof Object(1n).valueOf(); // bigint
+```
+
+## 仕様書
+
+{{Specifications}}
+
+## ブラウザーの互換性
+
+{{Compat}}
+
+## 関連情報
+
+- {{jsxref("BigInt.prototype.toString()")}}