webpack.config.js


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const ESLintPlugin = require('eslint-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin')
const TerserPlugin = require('terser-webpack-plugin')

module.exports = (env, argv) => {
    const dev = argv.mode !== 'production'
    const config = {
        devtool: dev ? 'source-map' : false,
        entry: {
            'scripts': [
                __dirname + '/src/main/assets/scripts.js',
                __dirname + '/src/main/assets/style.css'
            ]
        },
        output: {
            path: __dirname + '/src/main/resources/static',
            filename: '[name].js'
        },
        module: {
            rules: [{
                test: /\.js$/,
                exclude: [
                    /\bnode_modules\b/,
                    /\bcore-js\b/,
                    /\bwebpack\/buildin\b/
                ],
                loader: 'babel-loader'
            }, {
                test: /\.(css)$/,
                use: [
                    {
                        loader: MiniCssExtractPlugin.loader,
                    },
                    {
                        loader: 'css-loader',
                        options: {
                            sourceMap: true,
                        },
                    },
                    {
                        loader: 'postcss-loader',
                        options: {
                            postcssOptions: {
                                plugins: [
                                    [
                                        'postcss-preset-env',
                                        'stylelint',
                                        'autoprefixer',
                                        {
                                            'grid': true
                                        }
                                    ],
                                ],
                            },
                        },
                    },
                ],
            }, {
                test: /\.(png|jpe?g|gif|svg)$/i,
                type: 'asset/resource'
            }]
        },
        plugins: [
            new MiniCssExtractPlugin({ filename: 'style.css' })
        ],
        resolve: {
            symlinks: false,
            extensions: ['.js']
        }
    }
    if (dev) {
        config.devServer = {
            hot: true,
            historyApiFallback: true,
            client: {
              overlay: {
                runtimeErrors: true
              }
            }
          }
        config.plugins.push(
            new ESLintPlugin({
                files: 'src/main/assets',
                lintDirtyModulesOnly: true,
                failOnWarning: false,
                failOnError: true,
                fix: false
            }))
    }
    config.optimization = {
        minimize: !dev,
        minimizer: [
            new TerserPlugin({
                minify: TerserPlugin.swcMinify,
                // `terserOptions` options will be passed to `swc` (`@swc/core`)
                // Link to options - https://swc.rs/docs/config-js-minify
                terserOptions: {},
            }),
            new CssMinimizerPlugin()
        ]
    }
    return config
}