webpack.config.js

const path = require('path');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");

const config = {
  mode: 'development',
  optimization: {
    minimizer: [
      new TerserPlugin(),
      new OptimizeCSSAssetsPlugin({})
    ]
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: 'h5p-dialogcards.css'
    })
  ],
  entry: {
    dist: './src/entries/h5p-dialogcards.js'
  },
  output: {
    filename: 'h5p-dialogcards.js',
    path: path.resolve(__dirname, 'dist')
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        options: {
          presets: [
            "@babel/preset-env"
          ]
        }
      },
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader, 'css-loader'
        ],
      },
      {
        test: /\.svg$/,
        loader: 'url-loader'
      }
    ]
  },
  stats: {
    colors: true
  }
};

module.exports = (env, argv) => {
  if (argv.mode === 'development') {
    config.devtool = 'inline-source-map';
  }

  return config;
}