webpack.config.production.js

const webpack = require('webpack');
const HtmlWebPackPlugin = require("html-webpack-plugin");

module.exports = {
    module: {
        rules: [
            {
                test: /\.jsx?$/,
                exclude: /node_modules/,
                use: {
                    loader: "babel-loader"
                }
            },
            {
                test: /\.css$/,
                use: ['style-loader', 'css-loader']
            },
            {
                test: /\.html$/,
                use: [
                    {
                        loader: "html-loader"
                    }
                ]
            }
        ],
    },
    optimization: {
        minimize: true,
        namedModules: false
    },
    resolve: {
        extensions: ['.js', '.jsx']
    },
    plugins: [
        new webpack.DefinePlugin({
            'process.env': {
                'NODE_ENV': JSON.stringify('production')
            }
        }),
        new webpack.optimize.AggressiveMergingPlugin(),
        new HtmlWebPackPlugin({
            template: "./index.html",
            hash: false
        })
    ]
};