.eslintrc

{
    "parser": "babel-eslint",
    "extends": "airbnb",
    "rules": {
      "semi": [ 2, "never" ],
      "no-console": [ 0 ],
      "no-underscore-dangle": [ 0 ],
      "no-unused-vars": [ 2 ],
      "no-undef": [ 2 ],
      "no-use-before-define": [2, { "functions": false, "classes": true }],
      "flowtype/require-parameter-type": 1,
      "flowtype/require-return-type": [ 1, "always", { "annotateUndefined": "never" }],
      "flowtype/space-after-type-colon": [ 1, "always" ],
      "flowtype/space-before-type-colon": [ 1, "never" ],
    },
    "env": {
      "node": true,
      "es6": true,
      "mongo": true,
      "mocha": true
    },
    "parserOptions": {
      "ecmaFeatures": {
        "jsx": true,
        "templateStrings": true
      },
      "ecmaVersion": 6,
      "sourceType": "module"
    },
    "plugins": [
      "flowtype"
    ]
}