luhn-generator/update/node_modules/core-js/modules/core.number.iterator.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

'use strict';
require('./_iter-define')(Number, 'Number', function (iterated) {
  this._l = +iterated;
  this._i = 0;
}, function () {
  var i = this._i++;
  var done = !(i < this._l);
  return { done: done, value: done ? undefined : i };
});