.eslintrc

{
  "parserOptions": {
    "sourceType": "script",
    "ecmaVersion": 6,
    "ecmaFeatures": {}
  },
  "env": {
    "es6": true,
    "node": true,
    "browser": true
  },
  "extends": ["eslint:recommended"],
  "rules": {
    "indent": [2, 2, {"SwitchCase": 1}],
    "quotes": [2, "single", "avoid-escape"],
    "linebreak-style": [2, "unix"],
    "semi": [2, "never"],
    "eqeqeq": [2, "allow-null"],
    "no-extend-native": 2,
    "space-before-function-paren": [2, "never"],
    "curly": [2, "all"],
    "strict": [2, "safe"],
    "space-unary-ops": [2, {"words": true, "nonwords": false}],
    "space-infix-ops": [2, {"int32Hint": false}],
    "no-inline-comments": 2,
    "func-style": [2, "expression"],
    "callback-return": [2, ["done", "next"]],
    "no-path-concat": 2,
    "no-use-before-define": 2,
    "array-bracket-spacing": [2, "never"],
    "object-curly-spacing": [2, "never"],
    "brace-style": [2, "stroustrup", {"allowSingleLine": true}],
    "handle-callback-err": [2, "^(e|err|error)$" ],
    "one-var": [2, "never"],
    "no-unexpected-multiline": 2,
    "no-const-assign": 2,
    "prefer-const": 2,
    "no-var": 2
  }
}