webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

const isProduction = process.env.NODE_ENV == 'production';

const stylesHandler = isProduction ? MiniCssExtractPlugin.loader : 'style-loader';


const config = {
    entry: './src/index.js',
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'app.js',
    },
    devServer: {
        open: true,
        host: 'localhost',
    },
    plugins: [
        new HtmlWebpackPlugin({
            template: './src/common/index.html',
        }),
    ],
    module: {
        rules: [
            {
                test: /\.(js|jsx)$/i,
                loader: 'babel-loader',
            },
            {
                test: /\.s[ac]ss$/i,
                use: [stylesHandler, 'css-loader', 'sass-loader'],
            },
            {
                test: /\.(eot|svg|ttf|woff|woff2|png|jpg|gif)$/i,
                type: 'asset',
            },
            {
              test: /\.json$/i,
              type: 'json',
            }
        ],
    },
};

module.exports = () => {
    if (isProduction) {
        config.mode = 'production';

        config.plugins.push(new MiniCssExtractPlugin());


    } else {
        config.mode = 'development';
    }
    return config;
};