The Array[@@species]
accessor property returns the Array
constructor.
Syntax
Array[Symbol.species]
Return value
The Array
constructor.
Description
The species
accessor property returns the default constructor for Array
objects. Subclass constructors may override it to change the constructor assignment.
Examples
Species in ordinary objects
The species
property returns the default constructor function, which is the Array
constructor for Array
objects:
Array[Symbol.species]; // function Array()
Species in derived objects
In a derived collection object (e.g. your custom array MyArray
), the MyArray
species is the MyArray
constructor. However, you might want to overwrite this, in order to return parent Array
objects in your derived class methods:
class MyArray extends Array { // Overwrite MyArray species to the parent Array constructor static get [Symbol.species]() { return Array; } }
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'get Array [ @@species ]' in that specification. |
Browser compatibility
The compatibility table in 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.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
@@species | Chrome Full support 51 | Edge Full support 79 | Firefox Full support 48 | IE No support No | Opera Full support 38 | Safari Full support 10 | WebView Android Full support 51 | Chrome Android Full support 51 | Firefox Android Full support 48 | Opera Android Full support 41 | Safari iOS Full support 10 | Samsung Internet Android Full support 5.0 | nodejs
Full support
6.5.0
|
Legend
- Full support
- Full support
- No support
- No support
- User must explicitly enable this feature.
- User must explicitly enable this feature.