Taro: 首次引入 @tarojs/async-await 的文件中同时定义 async 函数，将会导致 regeneratorRuntime 报错

Created on 12 Oct 2018 · 7Comments · Source: NervJS/taro

问题描述
在 app.tsx 或者任意 tsx 文件中首次引入 @tarojs/async-await ，同时创建一个 aysnc 函数，生成的代码位置不正确，导致 regeneratorRuntime 未定义。

复现步骤

// 这里可以贴代码
import Taro, { Component, Config } from '@tarojs/taro'
import Index from './pages/index'

import './app.scss'
import '@tarojs/async-await';

async function aysnFunc() {
  let result = await Taro.getSystemInfo();
  console.log(result);
}

aysnFunc().then(() => {
  console.log('hello');
});

class App extends Component {

  /**
   * 指定config的类型声明为: Taro.Config
   *
   * 由于 typescript 对于 object 类型推导只能推出 Key 的基本类型
   * 对于像 navigationBarTextStyle: 'black' 这样的推导出的类型是 string
   * 提示和声明 navigationBarTextStyle: 'black' | 'white' 类型冲突, 需要显示声明类型
   */
  config: Config = {
    pages: [
      'pages/index/index'
    ],
    window: {
      backgroundTextStyle: 'light',
      navigationBarBackgroundColor: '#fff',
      navigationBarTitleText: 'WeChat',
      navigationBarTextStyle: 'black'
    }
  }

  componentDidMount () {}

  componentDidShow () {}

  componentDidHide () {}

  componentCatchError () {}

  render () {
    return (
      <Index />
    )
  }
}


Taro.render(<App />, document.getElementById('app'))

期望行为
正常运行无报错

报错信息

VM4865:1 thirdScriptError 
 sdk uncaught third Error 
 regeneratorRuntime is not defined 
 ReferenceError: regeneratorRuntime is not defined

生成的代码：

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var aysnFunc = function () {
  var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee() {
    var result;
    return regeneratorRuntime.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            _context.next = 2;
            return _index2.default.getSystemInfo();

          case 2:
            result = _context.sent;

            console.log(result);

          case 4:
          case "end":
            return _context.stop();
        }
      }
    }, _callee, this);
  }));

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

var _index = require("./npm/@tarojs/taro-weapp/index.js");

var _index2 = _interopRequireDefault(_index);

require("./npm/@tarojs/async-await/index.js");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

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"); }); }; }

aysnFunc().then(function () {
  console.log('hello');
});

var _App = function (_BaseComponent) {
  _inherits(_App, _BaseComponent);

  function _App() {
    _classCallCheck(this, _App);

    return _possibleConstructorReturn(this, (_App.__proto__ || Object.getPrototypeOf(_App)).apply(this, arguments));
    /**
     * 指定config的类型声明为: Taro.Config
     *
     * 由于 typescript 对于 object 类型推导只能推出 Key 的基本类型
     * 对于像 navigationBarTextStyle: 'black' 这样的推导出的类型是 string
     * 提示和声明 navigationBarTextStyle: 'black' | 'white' 类型冲突, 需要显示声明类型
     */
  }

  _createClass(_App, [{
    key: "componentDidMount",
    value: function componentDidMount() {}
  }, {
    key: "componentDidShow",
    value: function componentDidShow() {}
  }, {
    key: "componentDidHide",
    value: function componentDidHide() {}
  }, {
    key: "componentCatchError",
    value: function componentCatchError() {}
  }, {
    key: "_createData",
    value: function _createData() {}
  }]);

  return _App;
}(_index.Component);

exports.default = _App;

App(require('./npm/@tarojs/taro-weapp/index.js').default.createApp(_App));
_index2.default.initPxTransform({
  "designWidth": 750,
  "deviceRatio": {
    "640": 1.17,
    "750": 1,
    "828": 0.905
  }
});

系统信息