The valueOf()
method returns the primitive value of a Symbol object.
Symbol().valueOf();
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. | Draft |
Desktop | ||||||
---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
Basic support | 38 | 12 | 36 | No | 25 | 9 |
Mobile | |||||||
---|---|---|---|---|---|---|---|
Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
Basic support | Yes | 38 | Yes | 36 | 25 | 9 | Yes |
Server | |
---|---|
Node.js | |
Basic support | Yes |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/valueOf