webpack.config.js

const path = require('path');
const webpack = require('webpack');
const HTMLWebpackPlugin = require('html-webpack-plugin');
const uglifyJsPlugin = require('uglifyjs-webpack-plugin');
module.exports = {
  entry: './src/index.js',
  output: {
    library: 'HtmlLayer',// what value is available in browser
    libraryTarget: 'umd', //specifies how plugin will be imported here we want both import or require so we're suing
    // universal
    libraryExport: 'default',// means user can do this import VALUE from 'user-list'
    path: path.resolve(__dirname, 'dist'),
    filename: 'index.js'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },
      {
        test: /\.scss$/,
        use: [
          'style-loader',
          'css-loader',
          'postcss-loader',
          'sass-loader'
        ]
      }
    ]
  },
  plugins: [
    new uglifyJsPlugin(),
    new HTMLWebpackPlugin({
      template: path.resolve(__dirname, 'index.html')
    }),
    new webpack.HotModuleReplacementPlugin(),
  ]
};