get RegExp[@@species]

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




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


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

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:

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


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.

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

Document Tags and Contributors

 Contributors to this page: arai, h4writer, fscholz
 Last updated by: arai,