const webpack = require('webpack') const config = require('sapper/webpack/config.js') const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin const LodashModuleReplacementPlugin = require('lodash-webpack-plugin') const UglifyWebpackPlugin = require('uglifyjs-webpack-plugin') const isDev = config.dev module.exports = { entry: config.client.entry(), output: config.client.output(), resolve: { extensions: ['.js', '.json', '.html'] }, mode: isDev ? 'development' : 'production', module: { rules: [ { test: /\.html$/, exclude: /node_modules/, use: { loader: 'svelte-loader', options: { hydratable: true, emitCss: !isDev, cascade: false, store: true } } }, isDev && { test: /\.css$/, use: [ { loader: 'style-loader' }, { loader: 'css-loader' } ] }, !isDev && { test: /\.css$/, use: [ { loader: 'style-loader' }, { loader: 'css-loader' } ] } ].filter(Boolean) }, node: { setImmediate: false }, optimization: { minimizer: isDev ? [] : [new UglifyWebpackPlugin({ cache: true, parallel: true, sourceMap: true, uglifyOptions: { ecma: 6, mangle: true, compress: true, output: { comments: false } } })] }, plugins: [ new LodashModuleReplacementPlugin({ collections: true, caching: true }) ].concat(isDev ? [ new webpack.HotModuleReplacementPlugin() ] : [ new webpack.DefinePlugin({ 'process.browser': true, 'process.env.NODE_ENV': '"production"' }), new BundleAnalyzerPlugin({ // generates report.html and stats.json analyzerMode: 'static', generateStatsFile: true, statsOptions: { // allows usage with http://chrisbateman.github.io/webpack-visualizer/ chunkModules: true }, openAnalyzer: false, logLevel: 'silent' // do not bother Webpacker, who runs with --json and parses stdout }) ]), devtool: isDev ? 'cheap-module-source-map' : 'source-map' }