Symbol.prototype.valueOf() - JavaScript | MDN
Try it
const symbol = Symbol("foo");
console.log(typeof Object(symbol));
// Expected output: "object"
console.log(typeof Object(symbol).valueOf());
// Expected output: "symbol"
Syntax
Parameters
None.
Return value
The primitive value of the specified Symbol object.
Description
The valueOf() method of Symbol returns the primitive value of a Symbol object as a Symbol data type.
JavaScript calls the valueOf() method to convert an object to a primitive value. You rarely need to invoke the valueOf() method yourself; JavaScript automatically invokes it when encountering an object where a primitive value is expected.
Examples
Using valueOf()
js
const sym = Symbol("example");
sym === sym.valueOf(); // true
Specifications
| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-symbol.prototype.valueof |