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
Symbolfunction by default.
Methods
Symbol.prototype.toSource()- Returns a string containing the source of the
Symbolobject. 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
Symbolobject. Overrides theObject.prototype.valueOf()method. Symbol.prototype[@@toPrimitive]- Returns the primitive value of the
Symbolobject.
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
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | 36.0 (36.0) | No support | No support | No support |
| @@toPrimitive | ? | ? | 44.0 (44.0) | ? | ? | ? |
| Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | 36.0 (36.0) | No support | No support | No support |
| @@toPrimitive | ? | ? | ? | 44.0 (44.0) | ? | ? | ? |