问题描述
我正在尝试使用 Webpack 构建一个简单的 React 应用程序,但是在从 Webpack 开发服务器运行时,我收到以下错误:
I am trying to build a simple React app using Webpack, however during run time from the Webpack dev server I get the following error:
> ERROR in ./client/components/home.js Module parse failed: Unexpected
> token (8:3) You may need an appropriate loader to handle this file
> type. | render(){ | return( | <h1>Hello World!</h1> | ) | }
> @ ./client/app.js 13:12-43 @ multi
> (webpack)-dev-server/client?http://localhost:8080 ./client/app.js
这是我的 Webpack.config.js 文件内容:
Here is my Webpack.config.js file contents:
var path = require('path');
var debug = process.env.NODE_ENV !== 'production';
var webpack = require('webpack');
module.exports = {
context: __dirname,
devtool: debug ? 'inline-sourcemap' : null,
entry: './client/app.js',
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'app.js'
},
module: {
loaders: [{
test: /\.js?$/,
exclude: /(node_modules|bower_components)/,
include: [path.resolve(__dirname, 'client/app.js')],
loader: 'babel-loader',
query: {
presets: ['react', 'es2015', 'stage-3'],
plugins: ['transform-react-jsx']
}
}, {
test: /\.scss$/,
include: [path.resolve(__dirname, 'sass/style.scss')],
loaders: ['style-loader' ,'css-loader' ,'sass-loader']
}]
},
plugins: debug ? [] : [
new webpack.optimize.DedupePlugin(),
new webpack.optimize.OccurenceOrderPlugin(),
new webpack.optimize.UglifyJsPlugin({
mangle: false,
sourcemap: false
}),
],
};
app.js 文件内容从反应"导入反应从'react-dom' 导入 ReactDOM从react-router-dom"导入 { Switch, BrowserRouter, Route }从'./components/home.js'导入主页
app.js file contentsimport React from 'react'import ReactDOM from 'react-dom'import { Switch, BrowserRouter, Route } from 'react-router-dom'import Home from './components/home.js'
ReactDOM.render((
<BrowserRouter>
<Switch>
<Route exact path="/" component={Home}/>
</Switch>
</BrowserRouter>
),
document.getElementById('app')
)
下面是我的文件夹结构如下:
And below is my folder structure as follows:
推荐答案
我认为这可能与您的加载器的 includes
属性有关:
I think it might have something to do with your includes
property for your loader:
// Here you are telling babel to ONLY transpile client/app.js. One file.
include: [path.resolve(__dirname, 'client/app.js')]
应该是:
// Instead, it needs to transpile ALL .js files under /client
include: [path.resolve(__dirname, 'client')],
这篇关于React/Webpack - “模块解析失败:意外令牌 - 您可能需要适当的加载器来处理此文件类型."的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!