webpack.config.js

const path = require('path');
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
const CleanWebpackPlugin = require('clean-webpack-plugin');
const webpack = require('webpack');
const HtmlWebpackPlugin = require("html-webpack-plugin");

module.exports = {
    entry: './src/index.js',
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, 'dist')
    },
    devtool: 'inline-source-map',
    devServer: {
        contentBase: path.join(__dirname, 'dist'),
        hot: true
    },
    optimization: {
        minimizer: [
            new UglifyJsPlugin({
                cache: true,
                parallel: true,
                sourceMap: true // set to true if you want JS source maps
            }),
            new OptimizeCSSAssetsPlugin({})
        ]
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: 'babel-loader'
                }
            },
            {
                test: /\.css/,
                use: [
                    'css-hot-loader',
                    MiniCssExtractPlugin.loader,
                    'css-loader',
                ],
            },
            {
                test: /\.html$/,
                use: [
                    {
                        loader: "html-loader",
                        options: { minimize: true }
                    }
                ]
            }
        ]
    },
    plugins: [
        new CleanWebpackPlugin(['dist']),
        new MiniCssExtractPlugin({
            filename: "[name].css",
            chunkFilename: "[id].css"
        }),
        new webpack.HotModuleReplacementPlugin(),
        new HtmlWebpackPlugin({
            template: "./src/index.html",
            filename: "./index.html"
        }),
        new webpack.DefinePlugin({
            'ENABLE_FILTER_TEST': JSON.stringify(true)
        })
    ]
};