const merge = require('webpack-merge') const common = require('./webpack.common.js') const TerserPlugin = require('terser-webpack-plugin'); module.exports = common.map( config => merge(config, { mode: 'production', devtool: '#source-map', // This is required to keep IE11 compatibility (see #21316) optimization: { minimize: true, minimizer: [ new TerserPlugin({ terserOptions: { output: { keep_quoted_props: true, }, }, }), ], }, }) )