valueOf()
메서드는 Number
객체가 감싼wrapped 원시 값을 반환합니다.
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구문
numObj.valueOf()
반환 값
Number
객체의 원시 값.
설명
valueOf()
메서드는 보통 JavaScript에 의해 내부적으로 호출되고, 웹 코드에서는 명시적으로 호출하지 않습니다.
예제
valueOf
사용하기
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 | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.1. |
ECMAScript 5.1 (ECMA-262) The definition of 'Number.prototype.valueOf' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Number.prototype.valueOf' in that specification. |
Standard | |
ECMAScript Latest Draft (ECMA-262) The definition of 'Number.prototype.valueOf' in that specification. |
Draft |
브라우저 호환성
The compatibility table in 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.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
valueOf | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 4 | Opera Full support Yes | Safari Full support Yes | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support 1.0 | nodejs Full support Yes |
Legend
- Full support
- Full support