webpack.config.js

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

module.exports = {
    mode: 'production',
    entry: './src/index.js',
    output: {
        filename: 'main.js',
        path: path.resolve(__dirname, 'dist'),
        clean: true,
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /(node_modules)/,
            },
            {
                test: /\.(sa|sc|c)ss$/,
                use: [
                    {
                        loader: MiniCssExtractPlugin.loader
                    },
                    {
                        loader: 'css-loader',
                    },
                    {
                        loader: 'postcss-loader',
                    },
                    {
                        loader: 'sass-loader',
                        options: {
                            implementation: require('sass'),
                        },
                    },
                ],
            },
        ],
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename: 'main.css',
        }),
    ],
};