Number.prototype.valueOf()

Baseline

20157

valueOf() Number

const numObj = new Number(42);
console.log(typeof numObj);
// : "object"

const num = numObj.valueOf();
console.log(num);
// : 42

console.log(typeof num);
// : "number"

valueOf()

Number

JavaScript

valueOf

const numObj = new Number(10);
console.log(typeof numObj); // object

const num = numObj.valueOf();
console.log(num); // 10
console.log(typeof num); // number


ECMAScript 2027 LanguageSpecification # sec-number.prototype.valueof

Object.prototype.valueOf()

MDN

MDN 2025828

GitHub

Number
1. Number()
Object/Function
1. __proto__
2. constructor