webpack + babel

.babelrc

{
  "presets": [
    ["env", {
      "modules": false,
      "targets": {
        "browsers": "last 2 versions"
      }
    }],
    "stage-2"
  ],
  "plugins": ["transform-runtime"],
  "comments": false,
}

.eslintrc.js

module.exports = {
    "extends": "standard",
    "plugins": [
        "standard",
        "promise"
    ],
    env: {
      node: true
    }
};

package.json

{
  "scripts": {
    "build": "webpack",
    "dev": "webpack-dev-server"
  },
  "devDependencies": {
    "babel-core": "^6.24.1",
    "babel-loader": "^6.4.1",
    "babel-preset-env": "^1.4.0",
    "eslint": "^3.19.0",
    "eslint-config-standard": "^10.2.1",
    "eslint-plugin-import": "^2.2.0",
    "eslint-plugin-node": "^4.2.2",
    "eslint-plugin-promise": "^3.5.0",
    "eslint-plugin-standard": "^3.0.1",
    "webpack": "^2.4.1",
    "webpack-dev-server": "^2.4.2"
  },
  "dependencies": {
    "babel-plugin-transform-runtime": "^6.23.0",
    "babel-preset-stage-2": "^6.24.1"
  }
}

webpack.config.js

const path = require('path')
const resolve = value => path.resolve(__dirname, value)

module.exports = {
  entry: resolve('src/index.js'),
  output: {
    filename: 'index.js',
    publicPath: '/dist/',
    path: resolve('dist/')
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader'
        }
      }
    ]
  },
  devServer: {
    hot: false
  }
}