webpack.config.js

const webpack = require("webpack");
const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
// const BundleAnalyzerPlugin = require("webpack-bundle-analyzer").BundleAnalyzerPlugin;
const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const CompressionPlugin = require("compression-webpack-plugin");

const config = {
    entry: {
        app: path.join(__dirname, "client", "index.js"),
    },
    output: {
        path: path.join(__dirname, "dist", "data", "public"),
        publicPath: "/",
        filename: "assets/js/[name]_[hash].js",
        chunkFilename: "assets/js/chunk_[name]_[id]_[hash].js",
    },
    devServer: {
        static: {
            directory: path.join(__dirname, "dist", "data", "public"),
        },
        compress: true,
        port: 9001,
        historyApiFallback: {
            index: "/index.html",
        },
    },
    module: {
        rules: [
            {
                test: path.join(__dirname, "client"),
                use: ["babel-loader"],
                exclude: /node_modules/,
            },
            {
                test: /\.html$/,
                loader: "html-loader",
            },
            {
                test: /\.woff2$/,
                loader: "woff-loader",
            },
            {
                test: /\.scss$/,
                loaders: ["style-loader", "css-loader", "sass-loader"],
            },
            {
                test: /\.css$/,
                loaders: ["style-loader", "css-loader"],
            },
            {
                test: /\.(pdf|jpg|png|gif|svg|ico|woff|woff2|eot|ttf)$/,
                loader: "url-loader",
            },
            {
                test: /[a-z]+\.worker\.js$/,
                loader: "worker-loader",
                options: { name: "assets/js/[name]_[hash].js" },
            },
        ],
    },
    plugins: [
        new webpack.DefinePlugin({
            "process.env.NODE_ENV": JSON.stringify(process.env.NODE_ENV),
        }),
        new HtmlWebpackPlugin({
            template: path.join(__dirname, "client", "index.html"),
            inject: true,
            minify: {
                collapseWhitespace: true,
                removeComments: true,
                minifyJS: true,
                minifyCSS: true,
            },
        }),
        new CopyWebpackPlugin([
            { from: "locales/*.json", to: "assets/" },
            { from: "worker/*.js", to: "assets/" },
            { from: "assets/logo/*" },
            { from: "assets/icons/*" },
            { from: "assets/fonts/*" },
        ], { context: path.join(__dirname, "client") }),
        new CopyWebpackPlugin([
            { from: "node_modules/pdfjs-dist/", to: "assets/vendor/pdfjs/2.6.347/" },
        ]),
        // new BundleAnalyzerPlugin()
    ],
};


if (process.env.NODE_ENV === "production") {
    config.plugins.push(new UglifyJSPlugin({
        sourceMap: false,
        extractComments: true,
    }));
    config.plugins.push(new CompressionPlugin({
        asset: "[path].gz[query]",
        algorithm: "gzip",
        test: /\.js$|\.json$|\.html$|\.svg|\.ico$/,
        threshold: 0,
        minRatio: 0.8,
    }));
    config.plugins.push(new CompressionPlugin({
        asset: "[path].br[query]",
        algorithm: "brotliCompress",
        test: /\.js$|\.json$|\.html$|\.svg|\.ico$/,
        threshold: 0,
        minRatio: 0.8,
    }));
} else {
    config.devtool = "#inline-source-map";
}

module.exports = config;