tictactoe/webpack.config.js

const path = require('path');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
    mode: 'development',
    entry: ['./src/index.js'],
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, 'dist'),
        library: 'ui'
    },
    module: {
        rules: [
            {
                test: /\.(sa|sc|c)ss$/,
                use: [
                    MiniCssExtractPlugin.loader,
                    'css-loader',
                    'sass-loader',
                ],
            }
        ]
    },
    target: "web",
    plugins: [
        new MiniCssExtractPlugin({
            // Options similar to the same options in webpackOptions.output
            // both options are optional
            filename: '[name].css',
            chunkFilename: '[id].css',
        })
    ]
};