yarn add --dev babel-loader @babel/core @babel/runtime @babel/preset-env @babel/plugin-transform-runtime webpack webpack-cli webpack-dev-server

//webpack.config.js
const path = require("path");

module.exports = {
  mode: "development",
  entry: {
    app: "./src/index.js"
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            plugins: ["@babel/plugin-transform-runtime"],
            presets: ["@babel/preset-env"]
          }
        },
      },
    ],
  },
  devtool: "inline-source-map",
  devServer: {
    contentBase: "./dist",
    stats: {colors: true},
  },
  output: {
    filename: "[name].bundle.js",
    // filename: "main.js",
    path: path.resolve(__dirname, "dist")
  }
};

{
  "devDependencies": {
    "@babel/core": "^7.6.0",
    "@babel/plugin-transform-runtime": "^7.6.0",
    "@babel/preset-env": "^7.6.0",
    "@babel/runtime": "^7.6.0",
    "babel-loader": "^8.0.6",
    "webpack": "^4.40.2",
    "webpack-cli": "^3.3.9",
    "webpack-dev-server": "^3.8.1"
  },
  "scripts": {
    "start": "webpack-dev-server --open",
    "build": "webpack"
  },
  "dependencies": {
    "lodash": "^4.17.15"
  }
}

yarn run start