example.es2015.js

'use strict';

let fact = (() => {
  var _ref = _asyncToGenerator(function* () {
    const response = yield fetch('https://catfact.ninja/fact');
    const data = yield response.json();
    return data.fact;
  });

  return function fact() {
    return _ref.apply(this, arguments);
  };
})();

function _asyncToGenerator(fn) {
  return function () {
    var gen = fn.apply(this, arguments);
    return new Promise(function (resolve, reject) {
      function step(key, arg) {
        try {
          var info = gen[key](arg);
          var value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(function (value) {
            step("next", value);
          }, function (err) {
            step("throw", err);
          });
        }
      }

      return step("next");
    });
  };
}