webpack.config.prod.js

var path = require("path");
var webpack = require("webpack");
var MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
    mode: "production",
    entry: "./playground/app",
    output: {
        path: path.join(__dirname, "build"),
        filename: "bundle.js",
        publicPath: "/static/",
    },
    plugins: [
        new MiniCssExtractPlugin({ filename: "styles.css", allChunks: true }),
        new webpack.DefinePlugin({
            "process.env": {
                NODE_ENV: JSON.stringify("production"),
            },
        }),
    ],
    resolve: {
        extensions: [".js", ".jsx", ".css"],
    },
    module: {
        rules: [
            {
                test: /\.jsx?$/,
                use: ["babel-loader"],
                include: [
                    path.join(__dirname, "src"),
                    path.join(__dirname, "playground"),
                    path.join(__dirname, "node_modules", "codemirror", "mode", "javascript"),
                ],
            },
            {
                test: /\.css$/,
                use: [
                    {
                        loader: MiniCssExtractPlugin.loader,
                    },
                    "css-loader",
                ],
                include: [
                    path.join(__dirname, "css"),
                    path.join(__dirname, "playground"),
                    path.join(__dirname, "node_modules"),
                ],
            },
        ],
    },
};