webpack.config.js

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

module.exports = {
  devtool: "source-map",
  mode: 'development',
  devServer: {
    contentBase: path.join(__dirname, './dist'),
    compress: true,
    hot: true,
    port: 8080
  },
  entry: {
    footer: './src/index.js'
  },
  module: {
    rules: [
      {
        enforce: "pre",
        test: /\.js$/,
        loader: "source-map-loader"
      }
    ]
  },
  output: {
    filename: 'sdk.js',
    path: path.resolve(__dirname, 'dist'),
  },
  plugins: [
    new HtmlWebpackPlugin({
      inject: false,
      filename: "index.html",
      template: 'index.ejs',
      files: {
        js: ["src/index.js"],
        chunks: {
          footer: {
            entry: "src/index.js"
          }
        }
      }
    }),
    new webpack.NamedModulesPlugin(),
    new webpack.HotModuleReplacementPlugin()
  ],
  resolve: {
    extensions: [".js"]
  }
};