webpack.prod.js

const webpack = require('webpack')
const TerserJSPlugin            = require('terser-webpack-plugin');
const OptimizeCSSAssetsPlugin   = require('optimize-css-assets-webpack-plugin');
const { merge }                 = require('webpack-merge');
const common                  = require('./webpack.common.js');

module.exports = merge(common, {
    mode: 'production',
    devtool: 'source-map',
    optimization: {
        minimizer: [
            new TerserJSPlugin({terserOptions: {compress: {inline: false}}}),
            new OptimizeCSSAssetsPlugin({})
        ],
        splitChunks: {
            chunks: 'all'
        }
    },
    plugins: [
        // http://vue-loader.vuejs.org/en/workflow/production.html
        new webpack.DefinePlugin({
            'process.env': {
                NODE_ENV: '"production"'
            }
        }),
        new webpack.LoaderOptionsPlugin({
            minimize: true
        })
    ]
});