ie8 babel

// .babelrc
{
  "plugins": [
    "transform-es3-member-expression-literals",
    "transform-es3-property-literals",
    "transform-object-rest-spread",
    "transform-class-properties",
    "add-module-exports"
  ],
  "presets": [
    "es2015-loose",
    "react"
  ]
}

// webpack babel loader
{
  test: /\.js$/,
  include: [
    path.resolve(__dirname, "client/js"),
    path.resolve(__dirname, "node_modules/react-router/es6"),
    path.resolve(__dirname, "node_modules/redux-promise-middleware")
  ],
  loader: 'babel-loader'
}