declare let exports: any;
declare let module: any;
declare let require: any;


const fetchSubstitute = (function () {

  if (typeof window !== 'undefined') {
    return window.fetch.bind(window);
  } else if (typeof exports === 'object' && typeof module !== 'undefined') {
    return require('node-fetch');
  } else if (typeof self !== 'undefined') {
    return self.fetch.bind(self);
  } else {
    throw new Error('Your environment is not defined');
  }

})();


export default fetchSubstitute;