Number.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 July 2015.
시도해보기
const numObj = new Number(42);
console.log(typeof numObj);
// Expected output: "object"
const num = numObj.valueOf();
console.log(num);
// Expected output: 42
console.log(typeof num);
// Expected output: "number"
구문
js
numObj.valueOf();
반환 값
Number
객체의 원시 값.
설명
valueOf()
메서드는 보통 JavaScript에 의해 내부적으로 호출되고, 웹 코드에서는 명시적으로 호출하지 않습니다.
예제
valueOf
사용하기
js
var numObj = new Number(10);
console.log(typeof numObj); // object
var num = numObj.valueOf();
console.log(num); // 10
console.log(typeof num); // number
명세
Specification |
---|
ECMAScript® 2025 Language Specification # sec-number.prototype.valueof |
브라우저 호환성
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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valueOf |
Legend
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- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.