String.prototype.valueOf()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. Itās been available across browsers since āØJuly 2015ā©.
The valueOf() method of String values returns this string value.
Try it
const stringObj = new String("foo");
console.log(stringObj);
// Expected output: String { "foo" }
console.log(stringObj.valueOf());
// Expected output: "foo"
Syntax
js
valueOf()
Parameters
None.
Return value
A string representing the primitive value of a given String object.
Description
The valueOf() method of String returns the primitive value
of a String object as a string data type. This value is equivalent to
String.prototype.toString().
This method is usually called internally by JavaScript and not explicitly in code.
Examples
Using valueOf()
js
const x = new String("Hello world");
console.log(x.valueOf()); // 'Hello world'
Specifications
| Specification |
|---|
| ECMAScriptĀ® 2026 LanguageĀ Specification # sec-string.prototype.valueof |