在 WebStorm 中运行新创建的 React JS 应用程序时出错 [英] Error while running a new created React JS app in WebStorm

问题描述

我刚刚使用 WebStorm 创建了一个新的网络应用程序；它带有一个模板，我没有添加任何新代码，但是当我尝试运行它时，它显示了这个错误:

 "E:\WebStormData\WebStorm 2017.2.2\bin\runnerw.exe" "C:\Program Files\nodejs\node.exe" --debug-brk=4096 --expose_debug_as=v8debug F:\MyApps\myapp\src\index.js调试器监听 [::]:4096F:\MyApps\myapp\src\index.js:1(function (exports, require, module, __filename, __dirname) { import React from 'react';^^^^^^语法错误:意外的令牌导入在 createScript (vm.js:56:10)在 Object.runInThisContext (vm.js:97:10)在 Module._compile (module.js:542:28)在 Object.Module._extensions..js (module.js:579:10)在 Module.load (module.js:487:32)在 tryModuleLoad (module.js:446:12)在 Function.Module._load (module.js:438:3)在 Timeout.Module.runMain [as _onTimeout] (module.js:604:10)在超时 (timers.js:386:14)在 tryOnTimeout (timers.js:250:5)

我的index.js.

从'react'导入React；从 'react-dom' 导入 ReactDOM；导入'./index.css';从'./App'导入应用程序；从 './registerServiceWorker' 导入 registerServiceWorker；ReactDOM.render(, document.getElementById('root'));注册服务工作者()；

我的App.js

import React, { Component } from 'react';从'./logo.svg'导入标志；导入'./App.css';类 App 扩展组件 {使成为() {返回 (<div className="应用程序"><div className="App-header"><img src={logo} className="App-logo" alt="logo"/><h2>欢迎反应</h2>

<p className="App-intro">首先，编辑 src/App.js;并保存以重新加载.</p>

);}}导出默认应用程序；

我的App.test.js

import React, { Component } from 'react';从'./logo.svg'导入标志；导入'./App.css';类 App 扩展组件 {使成为() {返回 (<div className="应用程序"><div className="App-header"><img src={logo} className="App-logo" alt="logo"/><h2>欢迎反应</h2>

<p className="App-intro">首先，编辑 src/App.js;并保存以重新加载.</p>

);}}导出默认应用程序；

有 WebStorm 经验的人帮我解决这个问题.

解决方案

从错误消息中我可以看出您正在尝试使用 Node.js 运行您的 React 组件.奇怪的想法.React 应用程序在浏览器中运行，这是一个客户端代码，因此您必须构建您的应用程序，启动它所在的服务器(在使用 File | New | Project... | React App 创建的应用程序中，您通常应该运行 npm run start 来构建应用程序并启动开发服务器)，然后使用 JavaScript 调试 运行配置.

请参阅 https://blog.jetbrains.com/webstorm/2017/01/debugging-react-apps/ 有关在 WebStorm 中调试 React 应用程序的更多信息

I have just created a new web app using WebStorm; it comes with a template and I haven't added any new code, but when I try to run it it shows this Error:

 "E:\WebStormData\WebStorm 2017.2.2\bin\runnerw.exe" "C:\Program Files\nodejs\node.exe" --debug-brk=4096 --expose_debug_as=v8debug F:\MyApps\myapp\src\index.js
Debugger listening on [::]:4096
F:\MyApps\myapp\src\index.js:1
(function (exports, require, module, __filename, __dirname) { import React from 'react';
                                                              ^^^^^^

SyntaxError: Unexpected token import
    at createScript (vm.js:56:10)
    at Object.runInThisContext (vm.js:97:10)
    at Module._compile (module.js:542:28)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Timeout.Module.runMain [as _onTimeout] (module.js:604:10)
    at ontimeout (timers.js:386:14)
    at tryOnTimeout (timers.js:250:5)

My index.js.

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import registerServiceWorker from './registerServiceWorker';

ReactDOM.render(<App />, document.getElementById('root'));
registerServiceWorker();

My App.js

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';

class App extends Component {
  render() {
    return (
      <div className="App">
        <div className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <h2>Welcome to React</h2>
        </div>
        <p className="App-intro">
          To get started, edit <code>src/App.js</code> and save to reload.
        </p>
      </div>
    );
  }
}

export default App;

My App.test.js

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';

class App extends Component {
  render() {
    return (
      <div className="App">
        <div className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <h2>Welcome to React</h2>
        </div>
        <p className="App-intro">
          To get started, edit <code>src/App.js</code> and save to reload.
        </p>
      </div>
    );
  }
}

export default App;

Some one with WebStorm experience to help me out with this.

解决方案

From the error message I can see that you are trying to run your React component with Node.js. Strange idea. React applications are run in browser, this is a client-side code, so you have to build your application, start the server it is hosted on (in applications created using File | New | Project... | React App, you should normally run npm run start to build the app and start dev server) and then run/debug it in browser using JavaScript Debug Run configuration.

Please see https://blog.jetbrains.com/webstorm/2017/01/debugging-react-apps/ for more information about debugging react apps in WebStorm

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