webpack.prod.js

const {merge} = require('webpack-merge');
const common = require('./webpack.common.js');
const CompressionPlugin = require('compression-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = common.map(c => merge(c, {
    mode: 'production',
    plugins: [
        new CompressionPlugin({
            test: /\.js/
        }),
    ],

    performance: {
        maxEntrypointSize: 850000,
        maxAssetSize: 850000
    },

    optimization: {
        minimize: true,
        minimizer: [
            new TerserPlugin({
                terserOptions: {
                    format: {
                        comments: false,
                    },
                    compress: {
                        drop_console: true,
                    },
                },
                extractComments: false,
            }),
        ],
    },
}));