如何将CRA创建的React应用程序部署到Heroku

Question

我通过从github存储库创建管道将我的react项目部署到heroku服务器。

react项目由import 'package:flutter/material.dart'; import 'model/continent_model.dart'; import 'services/continent_services.dart'; class ContinentPage2 extends StatefulWidget { ContinentPage2() : super(); @override _ContinentPageState createState() => _ContinentPageState(); } class _ContinentPageState extends State<ContinentPage2> { List<Continent> _continent; @override void initState() { super.initState(); ContinentServices.getContinent().then((continents) { setState(() { _continent = continents; }); }); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: Text('')), body: ListView.separated( separatorBuilder: (BuildContext context, int index) { return SizedBox(height: 10); }, shrinkWrap: true, itemCount: null == _continent ? 0 : _continent.length, itemBuilder: (context, index) { return Column(mainAxisAlignment: MainAxisAlignment.center, crossAxisAlignment: CrossAxisAlignment.center, children: <Widget>[ Row(mainAxisAlignment: MainAxisAlignment.center, crossAxisAlignment: CrossAxisAlignment.center, mainAxisSize: MainAxisSize.min, children: <Widget>[ Expanded(flex: 1, child: Text(_continent[index].continent)), Expanded( flex: 2, child: Container( height: 50, child: ListView.separated( separatorBuilder: (BuildContext context, int index) { return SizedBox(width: 10); }, shrinkWrap: true, scrollDirection: Axis.horizontal, itemCount: null == _continent ? 0 : _continent[index].country.length, itemBuilder: (context, countryIndex) { print(_continent[index].country[countryIndex].name); return Row(mainAxisAlignment: MainAxisAlignment.center, crossAxisAlignment: CrossAxisAlignment.center, children: <Widget>[ Container( width: 100, child: Column(children: <Widget>[ Text( _continent[index].country[countryIndex].name, ), Text(_continent[index].country[countryIndex].capital, style: TextStyle( color: Colors.blue, )), ])) ]); }))) ]) ]); })); } }

创建

Procfile

create-react-app

src / index.js

web: node src/index.js

并且我还在import React from 'react' import ReactDOM from 'react-dom' import './style.css' import App from './App' import * as serviceWorker from './serviceWorker' import { Provider } from 'react-redux' import { createStore, applyMiddleware } from 'redux' import Reducer from './redux' import thunk from 'redux-thunk' import { composeWithDevTools } from 'redux-devtools-extension' import AirlockTheme from './config/theme' import Pusher from 'pusher-js' import { setPusherClient } from 'react-pusher' const store = createStore(Reducer, composeWithDevTools(applyMiddleware(thunk))) // Puhser const pusherClient = new Pusher(process.env.REACT_APP_PUSHER_APP_KEY, { cluster: process.env.REACT_APP_PUSHER_APP_CLUSTER, }) setPusherClient(pusherClient) ReactDOM.render( <Provider store={store}> <AirlockTheme> <App /> </AirlockTheme> </Provider>, document.getElementById('root'), ) serviceWorker.unregister() 中添加了"type":"module"以启用ESMA脚本编译。

现在，我得到如下图所示的错误。 如何解决这个问题？ 错误屏幕截图