String.prototype.valueOf()

The valueOf() method of {{jsxref("String")}} values returns this string value.

{{InteractiveExample("JavaScript Demo: String.prototype.valueOf()")}}

```js interactive-example const stringObj = new String("foo");

console.log(stringObj); // Expected output: String { "foo" }

console.log(stringObj.valueOf()); // Expected output: "foo"

## Syntax

```js-nolint
valueOf()

Parameters#

None.

Return value#

A string representing the primitive value of a given {{jsxref("String")}} object.

Description#

The valueOf() method of {{jsxref("String")}} returns the primitive value of a {{jsxref("String")}} object as a string data type. This value is equivalent to {{jsxref("String.prototype.toString()")}}.

This method is usually called internally by JavaScript and not explicitly in code.

Examples#

Using valueOf()#

const x = new String("Hello world");
console.log(x.valueOf()); // 'Hello world'

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("String.prototype.toString()")}}
• {{jsxref("Object.prototype.valueOf()")}}