javascript - webpack packages vue and compresses js code and an error occurs

Question

'use strict'
const webpack = require('webpack')
const paths = require('./paths')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ManifestPlugin = require('webpack-manifest-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin')
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')

module.exports = {
    entry: paths.appEntry,
    output: {
        pathinfo: true,
        path: paths.appBuild,
        filename: '[name].[hash].js'
    },
    bail: true,
    devtool: 'source-map',
    resolve: {
        extensions: [
            '.js', '.vue', '.scss', '.css', '.json'
        ],
        alias: {
            'src': paths.appSrc
        }
    },
    module: {
        rules: [
            {
                test: /\.vue$/,
                loader: 'vue-loader',
                options: {
                    extract: true,
                    loaders: ExtractTextPlugin.extract({
                        use: [
                            {
                                loader: 'css-loader',
                                options: {
                                    minimize: true,
                                    sourcMap: true
                                }
                            }, {
                                loader: 'sass-loader',
                                options: {
                                    indentedSyntax: true,
                                    sourcMap: true
                                }
                            }
                        ],
                        fallback: 'vue-style-loader'
                    })
                }
            }, {
                test: /\.js$/,
                loader: 'babel-loader',
                exclude: /node_modules/
            }, {
                test: /\.(png|jpg|gif|svg)$/,
                loader: 'file-loader',
                options: {
                    name: '[name].[ext]?[hash]'
                }
            }
        ]
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new CaseSensitivePathsPlugin(),
        new webpack.DefinePlugin({
            PRODUCTION: JSON.stringify(process.env.NODE_ENV === 'prod')
        }),
        new HtmlWebpackPlugin({
            inject: true,
            template: paths.appHtml,
            minify: {
                removeComments: true,
                collapseWhitespace: true,
                removeRedundantAttributes: true,
                useShortDoctype: true,
                removeEmptyAttributes: true,
                removeStyleLinkTypeAttributes: true,
                keepClosingSlash: true,
                minifyJS: true,
                minifyCSS: true,
                minifyURLs: true
            }
        }),
        new webpack.optimize.UglifyJsPlugin({
            compress: {
                warnings: false,
                comparisons: false
            },
            output: {
                comments: false
            },
            sourceMap: true
        }),
        new OptimizeCSSPlugin({
            cssProcessorOptions: {
                safe: true
            }
        }),
        new ExtractTextPlugin({filename: '[name].[contenthash:8].css'}),
        new ManifestPlugin({fileName: 'asset-manifest.json'}),
        new CopyWebpackPlugin([
            {
                from: paths.appPublic,
                to: paths.appBuild,
                ignore: ['.*']
            }
        ])
    ]
}

The reason for the error seems to be that the uglifyjs plug-in does not recognize the es6 syntax

In addition, my css is not packaged into a css file independently and is still mixed with js. . .
Thank you for your help.

Answer 1

Your babel configuration is correct. In this case, a common possibility is that the .babelrc file is missing from the root directory of your project, so Babel does not translate ES6, causing Uglify to fail.

Append the following content .babelrc to the project root directory:

{
  "presets": [
    ["es2015", { "modules": false }]
  ]
}