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The Array[@@species] accessor property returns the Array constructor.

Sintaxe

Array[Symbol.species]

Return value

O construtor Array .

Descrição

The species accessor property returns the default constructor for Array objects. Subclass constructors may override it to change the constructor assignment.

Exemplos

The species property returns the default constructor function, which is the Array constructor for Array objects:

Array[Symbol.species]; // function Array()

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; }
}

Especificações

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'get Array [ @@species ]' in that specification.
Padrão Initial definition.
ECMAScript Latest Draft (ECMA-262)
The definition of 'get Array [ @@species ]' in that specification.
Rascunho  

Compatibilidade de navegadores

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support ? ?48 ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? ? ?48 ? ? ?

1. From version 6.0.0: this feature is behind the --harmony runtime flag.

Veja também

Etiquetas do documento e colaboradores

Colaboradores desta página: Filipe-Souza
Última atualização por: Filipe-Souza,