The RegExp[@@species]
accessor property returns the RegExp
constructor.
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Description
The species
accessor property returns the default constructor for RegExp
objects. Subclass constructors may over-ride it to change the constructor assignment.
Examples
Species in ordinary objects
The species
property returns the default constructor function, which is the RegExp
constructor for RegExp
objects:
RegExp[Symbol.species]; // function RegExp()
Species in derived objects
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; }
}
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'get RegExp [ @@species ]' in that specification. |
Browser compatibility
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