const webpack = require('webpack'); const baseConfig = require('./webpack.config.base.babel'); module.exports = { ...baseConfig, devtool: false, mode: 'production', plugins: [ ...baseConfig.plugins, new webpack.DefinePlugin({ __DEV__: false, 'process.env.NODE_ENV': JSON.stringify('production'), 'process.env.HOT': JSON.stringify(null) }) ] };