Symbol.prototype

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

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 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