webpack.config.js

const webpack = require("webpack");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

const devMode = process.env.NODE_ENV !== "production";
const SRC_DIR = __dirname + "/src";
const DIST_DIR = __dirname + "/dist";

module.exports = {
    entry: [SRC_DIR + "/index.jsx"],
    output: {
        path: DIST_DIR,
        publicPath: "/",
        filename: "bundle.js"
    },
    module: {
        rules: [
            {
                test: /\.(js|jsx)$/,
                exclude: /node_modules/,
                use: {
                    loader: "babel-loader"
                }
            },
            {
                test: /\.(scss|sass|css)$/,
                exclude: /node_modules/,
                loaders: [
                    MiniCssExtractPlugin.loader,
                    {
                        loader: "css-loader",
                        options: {
                            modules: true,
                            sourceMap: true,
                            importLoaders: 1,
                            localIdentName: "[local]___[hash:base64:5]"
                        }
                    },
                    "sass-loader"
                ]
            },
            {
                test: /\.(html)$/,
                exclude: /node_modules/,
                use: {
                    loader: "html-loader",
                    options: {minimize: true}
                }
            }
        ]
    },
    resolve: {
        extensions: ["*", ".js", ".jsx"]
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new HtmlWebpackPlugin({
            template: SRC_DIR + "/index.html",
            filename: "./index.html"
        }),
        new MiniCssExtractPlugin({
            filename: devMode ? "[name].css" : "[name].[hash].css",
            chunkFilename: devMode ? "[id].css" : "[id].[hash].css"
        })
    ],
    devServer: {
        contentBase: DIST_DIR,
        hot: true,
        port: 9000,
        historyApiFallback: true,
    }
};