The Symbol
.prototype
property represents the prototype for the Symbol
constructor.
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Property attributes of Symbol.prototype |
|
---|---|
Writable | no |
Enumerable | no |
Configurable | no |
Description
Symbol
instances inherit from Symbol.prototype
. You can use the constructor's prototype object to add properties or methods to all Symbol
instances.
Properties
Symbol.prototype.constructor
- Returns the function that created an instance's prototype. This is the
Symbol
function by default.
Methods
Symbol.prototype.toSource()
- Returns a string containing the source of the
Symbol
object. Overrides theObject.prototype.toSource()
method. Symbol.prototype.toString()
- Returns a string containing the description of the Symbol. Overrides the
Object.prototype.toString()
method. Symbol.prototype.valueOf()
- Returns the primitive value of the
Symbol
object. Overrides theObject.prototype.valueOf()
method. Symbol.prototype[@@toPrimitive]
- Returns the primitive value of the
Symbol
object.
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Symbol.prototype' in that specification. |
Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262) The definition of 'Symbol.prototype' in that specification. |
Draft |
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.
Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 38 | 12 | 36 | No | 25 | 9 |
Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
---|---|---|---|---|---|---|---|
Basic support | Yes | 38 | Yes | 36 | 25 | 9 | Yes |