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BigInt.prototype.valueOf() - JavaScript | MDN
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BigInt.prototype.valueOf()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2020年9月.
valueOf() メソッドは、 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。
試してみましょう
console.log(typeof Object(1n));
// Expected output: "object"
console.log(typeof Object(1n).valueOf());
// Expected output: "bigint"
構文
js
bigIntObj.valueOf();
返値
指定された 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
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-bigint.prototype.valueof |
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