core-js/modules/$.global.js

Standard library

// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
var UNDEFINED = 'undefined';
var global = module.exports = typeof window != UNDEFINED && window.Math == Math
  ? window : typeof self != UNDEFINED && self.Math == Math ? self : Function('return this')();
if(typeof __g == 'number')__g = global; // eslint-disable-line no-undef