.eslintrc.json

{
  "root": true,
  "extends": "eslint:recommended",
  "env": {
    "node": true
  },
  "parserOptions": {
    "ecmaVersion": 8,
    "ecmaFeatures": {
      "experimentalObjectRestSpread": true
    }
  },
  "rules": {
    "no-undef": 2,
    "no-unused-vars": 2,
    "eqeqeq": 2,
    "quotes": [
      0,
      "single"
    ],
    "strict": 0,
    "no-use-before-define": 0,
    "curly": [
      2,
      "multi-line"
    ],
    "no-shadow": 0,
    "new-cap": 0,
    "eol-last": 0,
    "no-underscore-dangle": 0,
    "no-console": 1,
    "space-before-function-paren": [
      2,
      {
        "anonymous": "always",
        "named": "never"
      }
    ],
    "space-before-blocks": [
      2,
      {
        "functions": "always",
        "keywords": "always",
        "classes": "always"
      }
    ],
    "keyword-spacing": [
      2,
      {
        "before": true,
        "after": true
      }
    ]
  },
  "globals": {
    "Promise": true
  }
}