webpack.config.js

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

const mode = process.argv.includes('--mode=production') ?
  'production' : 'development';

module.exports = {
  mode: mode,
  entry: {
    'h5p-category-task': path.join(__dirname, 'src', 'app.js')
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].js',
    clean: true
  },
  target: ['browserslist'],
  plugins: [
    new MiniCssExtractPlugin({
      filename: '[name].css'
    })
  ],
  resolve: {
    modules: [
      path.resolve('./src'),
      path.resolve('./node_modules')
    ]
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        include: path.resolve(__dirname, 'src'),
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        },
      },
      {
        test: /\.(s[ac]ss|css)$/,
        include: path.resolve(__dirname, 'src'),
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: ''
            }
          },
          { loader: 'css-loader' },
          { loader: 'sass-loader' }
        ]
      },
      {
        test: /\.(png|woff|woff2|eot|ttf|svg|gif)$/,
        include: [
          path.resolve(__dirname, 'src'),
          path.resolve(__dirname, 'assets'),
        ],
        type: 'asset/resource'
      }
    ]
  },
  optimization: {
    splitChunks: {
      name: 'vendor',
      chunks: 'all',
      cacheGroups: {
        vendors: {
          test: /[\\/]node_modules[\\/]/,
          priority: -10
        },
        default: {
          minChunks: 2,
          priority: -20,
          reuseExistingChunk: true
        }
      }
    }
  },
  ...(mode !== 'production' && { devtool: 'eval-cheap-module-source-map' })
};