const HtmlWebpackPlugin = require('html-webpack-plugin'); //installed via npm
const path = require('path');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
    globalObject: `typeof self !== 'undefined' ? self : this`,
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: [
          { loader: "style-loader" },
          { loader: "css-loader" },
          { loader: "sass-loader" },
        ],
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
            plugins: [
              '@babel/plugin-transform-runtime',
              [
                '@babel/plugin-proposal-class-properties',
                { loose: true },
              ],
            ],
          },
        },
      },
      {
        test: /\.worker\.js$/,
        use: { loader: 'worker-loader' },
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({ template: './src/index.html' }),
  ],
  devServer: {
    contentBase: path.join(__dirname, 'dist'),
    compress: true,
    port: 8080,
    hot: true,
  }
};