webpack.config.js

const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

module.exports = [{
    entry: {
        popup: './js/popup/index.js',
        content: './js/content/index.js',
        background: './js/background.js',
        editor: './js/editor/index.js',
        processor: './js/processor.js',
        config: './js/config/index.js',
        'auth-content': './js/auth/auth-content.js',
        demofliocloud: './js/demofliocloud.js',
        overview: './js/popup/overview-loader.js',
        personas: './js/popup/personas-loader.js'
    },
    output: {
        filename: '[name]-bundle.js',
        path: path.resolve(__dirname, 'dist')
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename: 'css/[name].css'
        })
    ],
    resolve: {
        extensions: ['.js'],
        modules: ['node_modules']
    },
    module: {
        rules: [
            {
                test: /\.css$/,
                use: [
                    MiniCssExtractPlugin.loader,
                    {
                        loader: 'css-loader',
                        options: {
                            importLoaders: 1
                        }
                    },
                    'postcss-loader'
                ]
            }
        ]
    },
    optimization: {
        minimize: true,
        minimizer: [
            '...',
            new CssMinimizerPlugin({
                minimizerOptions: {
                    preset: [
                        'default',
                        {
                            discardComments: { removeAll: true },
                            normalizeWhitespace: true
                        },
                    ],
                },
            })
        ]
    },

    mode: 'production'
}];