Symbol.prototype

The Symbol.prototype property represents the prototype for the Symbol constructor.

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 the Object.prototype.toSource() method.
Symbol.prototype.toString()
Returns a string of containing the description of the Symbol. Overrides the Object.prototype.toString() method.
Symbol.prototype.valueOf()
Returns the primitive value of the Symbol object. Overrides the Object.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 2017 Draft (ECMA-262)
The definition of 'Symbol.prototype' in that specification.
Draft  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support ? 36.0 (36.0) No support No support No support
@@toPrimitive ? 44.0 (44.0) ? ? ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) 36.0 (36.0) No support No support No support
@@toPrimitive ? ? 44.0 (44.0) ? ? ?

Document Tags and Contributors

 Contributors to this page: ZeikJT, fscholz, arai
 Last updated by: ZeikJT,