webpack.component.config.js

const path = require('path');
const Dotenv = require('dotenv-webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin')

module.exports = {
  entry: path.resolve(__dirname, './src/web-component.js'),
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },
      {
        test: /\.css$/,
        use: [
          'css-loader',
        ]
      },
      {
        test: /\.s[ac]ss$/i,
        // exclude: /node_modules/,
        use: [
          "sass-to-string",
          {
            loader: "sass-loader",
            options: {
              sassOptions: {
                outputStyle: "compressed",
              },
            },
          },
        ],
      },
    ]
  },
  resolve: {
    extensions: ['*', '.js', '.jsx', '.css']
  },
  output: {
    path: path.resolve(__dirname, './build'),
    filename: 'web-component.js',
  },
  devServer: {
    allowedHosts: [ 'react-ui-test-wc' ],
    contentBase: path.join(__dirname, 'public'),
    index: 'web-component.html',
    host: "0.0.0.0",
    port: 3001,
    writeToDisk: true,
  },
  plugins: [
    new Dotenv({
      path: './.env.webcomponent',
      systemvars: true
    }),
    new HtmlWebpackPlugin({
      inject: 'body',
      template: 'src/web-component.html',
      filename: 'web-component.html',
    })
  ]
};