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我无法使用webpack构建项目，因为我总是收到语法错误。 此外，当我的朋友在Linux上运行相同的代码（我在Windows 10上工作时），他没有得到任何错误，一切正常。webpack构建开发时的语法错误
这里是我的WebPack配置
const path = require('path');
const autoprefixer = require('autoprefixer');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const WebpackMd5Hash = require('webpack-md5-hash');
const CommonsChunkPlugin = require('webpack/lib/optimize/CommonsChunkPlugin');
const DefinePlugin = require('webpack/lib/DefinePlugin');
const HMRPlugin = require('webpack/lib/HotModuleReplacementPlugin');
const LoaderOptionsPlugin = require('webpack/lib/LoaderOptionsPlugin');
const NamedModulesPlugin = require('webpack/lib/NamedModulesPlugin');
const OccurrenceOrderPlugin = require('webpack/lib/optimize/OccurrenceOrderPlugin');
const ProgressPlugin = require('webpack/lib/ProgressPlugin');
const UglifyJsPlugin = require('webpack/lib/optimize/UglifyJsPlugin');
//=========================================================
// VARS
//---------------------------------------------------------
const NODE_ENV = process.env.NODE_ENV;
const DEVELOPMENT = NODE_ENV === 'development';
const PRODUCTION = NODE_ENV === 'production';
const HOST = process.env.HOST || '127.0.0.1';
const PORT = process.env.PORT || '3000';
//=========================================================
// LOADERS
//---------------------------------------------------------
const rules = {
js: {
test: /\.js$/,
exclude: /node_modules/,
loader: 'babel-loader',
},
json: {
test: /\.json$/,
loader: 'json-loader',
},
css: {
test: /\.css$/,
loader: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: ['css-loader', 'resolve-url-loader', 'postcss-loader'],
}),
},
scss: {
test: /\.scss$/,
loader: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: ['css-loader', 'resolve-url-loader', 'postcss-loader', 'sass-loader'],
}),
},
fonts: {
test: /\.(eot|svg|ttf|woff|woff2)$/,
loader: 'file-loader',
query: {
name: `[name].[ext]`,
publicPath: '/assets/fonts/',
}
},
images: {
test: /\.(svg|png|jpg|jpeg|gif)$/,
loader: 'file-loader',
query: {
limit: 10000,
name: `[name].[ext]`,
publicPath: '/assets/images/',
}
}
};
//=========================================================
// CONFIG
//---------------------------------------------------------
const config = {};
config.entry = {
polyfills: './src/application/polyfills.js',
main: ['./src/application/index.js'],
};
config.output = {
filename: 'assets/js/[name].js',
path: path.resolve('./dist'),
// publicPath: '/',
};
config.resolve = {
extensions: ['.js', '.json'],
modules: [
path.resolve('./src'),
'node_modules',
]
};
config.module = {
rules: [
rules.js,
rules.css,
rules.json,
rules.scss,
rules.fonts,
rules.images,
]
};
config.plugins = [
new LoaderOptionsPlugin({
debug: !PRODUCTION,
cache: !PRODUCTION,
minimize: PRODUCTION,
options: {
postcss: [
autoprefixer({
browsers: ['last 3 versions'],
})
],
sassLoader: {
outputStyle: PRODUCTION ? 'compressed' : 'expanded',
precision: 10,
sourceComments: false,
sourceMap: PRODUCTION,
}
}
}),
new DefinePlugin({
'process.env.NODE_ENV': JSON.stringify(NODE_ENV),
}),
new OccurrenceOrderPlugin(true),
new NamedModulesPlugin(),
new CommonsChunkPlugin({
name: 'polyfills',
chunks: ['polyfills'],
}),
// This enables tree shaking of the vendors modules
new CommonsChunkPlugin({
name: 'vendor',
chunks: ['main'],
minChunks: module => /node_modules/.test(module.resource),
}),
new CommonsChunkPlugin({
name: ['polyfills', 'vendor'].reverse(),
}),
new CopyWebpackPlugin([
{
from: './src/assets',
to: 'assets',
ignore: ['**/*.scss'],
}
]),
new ExtractTextPlugin({
filename: 'assets/css/[name].css',
disable: !PRODUCTION,
allChunks: true,
}),
new HtmlWebpackPlugin({
filename: 'index.html',
hash: false,
inject: 'body',
chunksSortMode: 'dependency',
template: './src/index.html',
})
];
//=====================================
// DEVELOPMENT
//-------------------------------------
if (DEVELOPMENT) {
config.devtool = 'cheap-module-source-map';
config.entry.main.unshift(
'react-hot-loader/patch',
`webpack-dev-server/client?http://${HOST}:${PORT}`,
'webpack/hot/only-dev-server',
);
config.plugins.push(
new HMRPlugin(),
new ProgressPlugin(),
);
config.devServer = {
contentBase: path.resolve(__dirname, 'dist'),
historyApiFallback: true,
host: HOST,
hot: true,
port: PORT,
stats: {
cached: true,
cachedAssets: true,
children: false,
chunks: false,
chunkModules: false,
colors: true,
modules: false,
hash: false,
reasons: true,
timings: true,
version: false,
}
};
}
//=====================================
// PRODUCTION
//-------------------------------------
if (PRODUCTION) {
config.devtool = 'hidden-source-map';
config.plugins.push(
new WebpackMd5Hash(),
new UglifyJsPlugin({
comments: false,
compress: {
unused: true,
dead_code: true,
screw_ie8: true,
warnings: false,
},
mangle: {
screw_ie8: true,
}
})
);
}
module.exports = config;
，这是我的package.json脚本
"scripts": {
"test": "jest",
"server:dev": "set NODE_ENV='development' && webpack-dev-server --color",
"start": "npm run server:dev",
"build": "set NODE_ENV='production' && webpack --color"
},
当我尝试运行 “故宫开始”，我有这样的错误
C:\Users\vellgreen\Desktop\my_webpack_react\webpack.config.js:184
);
^
SyntaxError: Unexpected token)
当我把这个评论一切正常。
config.entry.main.unshift(
'react-hot-loader/patch',
`webpack-dev-server/client?http://${HOST}:${PORT}`,
'webpack/hot/only-dev-server',
);
config.plugins.push(
new HMRPlugin(),
new ProgressPlugin(),
);
当我运行生产一切代码也未尝不可。 我的操作系统是Windows 10，webpack v3.1.0，npm v5.3.0，节点v6.10.3。
有谁知道什么可能会导致这样的错误？
工程！非常感谢你的回答和解释！ –