webpack.config.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const cleanWebpackPlugin = require('clean-webpack-plugin');

module.exports = {
  target: 'web',
  mode: 'development',
  context: __dirname,
  entry: {
    app: [
      'webpack-dev-server/client?http://localhost:8000',
      'webpack/hot/only-dev-server',
      './lib/es6/src/Demo.bs.js'
    ],
  },
  output: {
    path: path.resolve(__dirname, 'public'),
    filename: 'bundle.js',
    publicPath: 'http://localhost:8000/'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader"
        }
      }
    ]
  },
  plugins: [
    new webpack.NamedModulesPlugin(),
    new webpack.HotModuleReplacementPlugin(),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'template/index.html'),
    }),
  ],
  devServer: {
    port: 8000,
    hot: true,
    inline: true,
    headers: {
        'Access-Control-Allow-Origin': '*',
    }
  }
};