You’re reading the English version of this content since no translation exists yet for this locale. Help us translate this article!

The valueOf() method returns the primitive value of a Symbol object.



Return value

The primitive value of the specified Symbol object.


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.


Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Symbol.prototype.valueOf' in that specification.
Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
The definition of 'Symbol.prototype.valueOf' in that specification.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
valueOfChrome Full support 38Edge Full support 12Firefox Full support 36IE No support NoOpera Full support 25Safari Full support 9WebView Android Full support 38Chrome Android Full support 38Firefox Android Full support 36Opera Android Full support 25Safari iOS Full support 9Samsung Internet Android Full support Yesnodejs Full support Yes


Full support  
Full support
No support  
No support

See also