The valueOf()
method returns the primitive value of a Symbol object.
Syntax
Symbol().valueOf()
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
const sym = Symbol("example"); sym === sym.valueOf(); // true
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Symbol.prototype.valueOf' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
valueOf | Chrome Full support 38 | Edge Full support 12 | Firefox Full support 36 | IE No support No | Opera Full support 25 | Safari Full support 9 | WebView Android Full support 38 | Chrome Android Full support 38 | Firefox Android Full support 36 | Opera Android Full support 25 | Safari iOS Full support 9 | Samsung Internet Android Full support 3.0 | nodejs Full support 0.12 |
Legend
- Full support
- Full support
- No support
- No support