webpack.prod.js

const common = require('./webpack.common.js');
const { merge } = require('webpack-merge');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

module.exports = merge(common, {
    output: {
        filename: '[name].min.js'
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename: '[name].min.css'
        })
    ],
    optimization: {
        minimizer: [
            new UglifyJsPlugin({
                cache: true,
                parallel: true,
                sourceMap: false
            }),
            new OptimizeCSSAssetsPlugin({})
        ]
    },
    mode: 'production'
});