webpack.common.js

const path = require('path');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const autoprefixer = require('autoprefixer');

module.exports = {
    entry: [
        './src/index.less',
        './src/index.js'
    ],
    plugins: [
        new CleanWebpackPlugin(['dist']),
        new HtmlWebpackPlugin({
            title: 'Production',
            inject: true,
            template: './src/index.html',
        })
    ],
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, 'dist')
    },
    module: {
        rules: [{
                test: /\.css$/,
                use: [{
                    loader: "style-loader" // creates style nodes from JS strings
                }, {
                    loader: "css-loader" // translates CSS into CommonJS
                }, {
                    loader: "postcss-loader",
                    options: {
                        plugins: () => autoprefixer({
                            browsers: ['last 3 versions', '> 1%']
                        })
                    }
                }]
            },
            {
                test: /\.(png|svg|jpg|gif)$/,
                use: [
                    {
                        loader: 'file-loader',
                        options: {
                            outputPath: 'images/'
                        }
                    }
                ]
            },
            {
                test: /\.js$/,
                exclude: /(node_modules|bower_components)/,
                loader: 'babel-loader',
                query: {
                    plugins: ['transform-runtime'],
                    presets: ['es2015', 'stage-0', 'react'],
                }
            },
            {
                test: /\.less$/,
                use: [{
                    loader: "style-loader" // creates style nodes from JS strings
                }, {
                    loader: "css-loader" // translates CSS into CommonJS
                }, {
                    loader: "postcss-loader",
                    options: {
                        plugins: () => autoprefixer({
                            browsers: ['last 3 versions', '> 1%']
                        })
                    }
                }, {
                    loader: "less-loader"
                }, 
                ]
            },
        ]
    },
    // webpack4最新配置，可以搜索关键字查查配置项
    optimization: {
        splitChunks: {
            cacheGroups: {
                commons: {
                    chunks: 'initial',
                    minChunks: 2,
                    maxInitialRequests: 5, // The default limit is too small to showcase the effect
                    minSize: 0, // This is example is too small to create commons chunks
                    name: 'common'
                }
            }
        }
    },
    node: {
        console: true,
        fs: 'empty',
        net: 'empty',
        tls: 'empty'
    }
};