get RegExp[@@species]

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

Syntax

JavaScript
RegExp[Symbol.species]

Description

The species accessor property returns the default constructor for RegExp objects. Subclass constructors may over-ride it to change the constructor assignment.

Examples

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

JavaScript
RegExp[Symbol.species]; // function RegExp()

In a derived collection object (e.g. your custom regexp MyRegExp), the MyRegExp species is the MyRegExp constructor. However, you might want to overwrite this, in order to return parent RegExp objects in your derived class methods:

JavaScript
class MyRegExp extends RegExp {
  // Overwrite MyRegExp species to the parent RegExp constructor
  static get [Symbol.species]() { return RegExp; }
}

Specifications

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'get RegExp [ @@species ]' in that specification.
Standard Initial definition.
ECMAScript 2017 Draft (ECMA-262)
The definition of 'get RegExp [ @@species ]' in that specification.
Draft  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support ? 49 (49) ? ? ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? 49.0 (49) ? ? ?

See also

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/javascript/reference/global_objects/regexp/@@species

JavaScript Property Prototype Reference RegExp Regular Expressions