get Array[@@species]
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 Language Specification # sec-get-array-@@species |
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