babel-autobind/.babelrc

it binds methods to its class prototype + Compatible with stub/spy used on unit-test frameworks (Sinon.Js, enzyme,...so on) + Can be integrated with 3rd party decorators (like @autobind decorator)

{
  "presets": ["es2015", "stage-1", "react"],
  "env": {},
  "plugins": [
      "transform-decorators-legacy",
      "react-html-attrs",
      "syntax-decorators",
      "transform-es2015-modules-commonjs"
  ]
}