.eslintrc.json

{
  "env": {
    "es6": true,
    "node": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 2017,
    "ecmaFeatures": {
      "experimentalObjectRestSpread": true
    }
  },
  "rules": {
    "no-console": 0,
    "no-empty": 0,
    "no-useless-escape": 0,
    "no-unused-vars": 1,
    "array-callback-return": 1,
    "block-scoped-var": 1,
    "complexity": 1,
    "no-caller": 1,
    "no-else-return": 1,
    "no-eval": 1,
    "no-floating-decimal": 1,
    "no-implicit-globals": 1,
    "no-proto": 1,
    "no-return-await": 1,
    "no-self-compare": 1,
    "no-throw-literal": 1,
    "no-useless-call": 1,
    "no-useless-concat": 1,
    "no-useless-return": 1,
    "no-with": 1,
    "prefer-promise-reject-errors": 1,
    "radix": 1,
    "vars-on-top": 1,
    "no-use-before-define": 1,
    "comma-dangle": 1,
    "indent": ["error", 2],
    "no-trailing-spaces": 1,
    "no-whitespace-before-property": 1,
    "semi": 1,
    "space-before-function-paren": ["warn", {
      "anonymous": "never", "named": "never", "asyncArrow": "always"
    }],
    "no-useless-computed-key": 1,
    "prefer-const": 1,
    "no-useless-rename": 1,
    "no-var": 1,
    "object-shorthand": 1,
    "prefer-arrow-callback": 1,
    "prefer-rest-params": 1,
    "prefer-spread": 1,
    "arrow-parens": ["warn", "as-needed"],
    "quotes": ["warn", "single"]
  },
  "globals": {
    "describe": true,
    "it": true,
    "before": true,
    "after": true
  }
}