Number.prototype.valueOf()
- Standard built-in objects
Number- Properties
- Methods
Number.isFinite()Number.isInteger()Number.isNaN()Number.isSafeInteger()Number.parseFloat()Number.parseInt()Number.prototype.toExponential()Number.prototype.toFixed()Number.prototype.toLocaleString()(en-US)Number.prototype.toPrecision()Number.prototype.toSource()(en-US)Number.prototype.toString()Number.prototype.valueOf()
- Inheritance:
Function- Properties
- Methods
Object- Properties
- Methods
Object.prototype.__defineGetter__()Object.prototype.__defineSetter__()(en-US)Object.prototype.__lookupGetter__()(en-US)Object.prototype.__lookupSetter__()(en-US)Object.prototype.hasOwnProperty()Object.prototype.isPrototypeOf()Object.prototype.propertyIsEnumerable()Object.setPrototypeOf()Object.prototype.toLocaleString()Object.prototype.toSource()(en-US)Object.prototype.toString()Object.prototype.valueOf()
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 (ECMA-262) The definition of 'Number.prototype.valueOf' in that specification. |
Living Standard |
브라우저 호환성
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