webpack.prod.js

const merge = require("webpack-merge");
const TerserPlugin = require("terser-webpack-plugin");
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

const common = require("./webpack.common.js");

module.exports = merge(common, {
    mode: "production",

    output: {
        filename: "[name].[hash:5].js",
        chunkFilename: "[id].[hash:5].css"
    },

    optimization: {
        minimizer: [
            new TerserPlugin({
                cache: true,
                parallel: true,
                sourceMap: true,
                exclude: /\/node_modules\//,
            }),
            new MiniCssExtractPlugin({
                filename: "[name].[hash:5].css",
                chunkFilename: "[id].[hash:5].css"
            }),
            new OptimizeCSSAssetsPlugin({}),
        ]
    }
});