core-js/internals/set-species.js

Standard library

'use strict';
var getBuiltIn = require('../internals/get-built-in');
var definePropertyModule = require('../internals/object-define-property');
var DESCRIPTORS = require('../internals/descriptors');
var SPECIES = require('../internals/well-known-symbol')('species');

module.exports = function (CONSTRUCTOR_NAME) {
  var C = getBuiltIn(CONSTRUCTOR_NAME);
  var defineProperty = definePropertyModule.f;
  if (DESCRIPTORS && C && !C[SPECIES]) defineProperty(C, SPECIES, {
    configurable: true,
    get: function () { return this; }
  });
};