webpack.config.prod.js

let webpack = require('webpack')
import baseConfig from './webpack.config.base'
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

module.exports = {
    ...baseConfig,
    mode: 'production',
    plugins: [
        ...baseConfig.plugins,
        new webpack.optimize.OccurrenceOrderPlugin(),
        new webpack.NoEmitOnErrorsPlugin(),
        new webpack.DefinePlugin({
            'process.env': {
                'GH_PAGES': JSON.stringify(JSON.parse(process.env.GH_PAGES ||
                    'false'))
            },
        })
    ],
    optimization: {
        minimize: true,
        minimizer: [
            new UglifyJsPlugin({
                cache: true,
                parallel: true,
            }),
            new OptimizeCSSAssetsPlugin({})
        ],
        splitChunks: {
            cacheGroups: {
                commons: {
                    test: /[\\/]node_modules[\\/]/,
                    name: 'vendor',
                    chunks: 'all'
                }
            }
        }
    },
    module: {
        ...baseConfig.module,
        rules: [
            ...baseConfig.module.rules
        ]
    }
}