.eslintrc.json

{
  "env": {
    "node": true,
    "es6": true
  },
  "rules": {
    "semi": 2,
    "comma-dangle": 2,
    "no-undef": 2,
    "no-extra-semi": 2,
    "no-eval": 2,
    "no-underscore-dangle": 0,
    "eqeqeq": [2, "smart"],
    "brace-style": [2, "1tbs", { "allowSingleLine": true }],
    "no-console": 2,
    "no-plusplus": 2,
    "space-unary-ops": [2, { "words": true, "nonwords": false }],
    "no-unused-vars": 2,
    "no-trailing-spaces": [2, { "skipBlankLines": true }],
    "no-unreachable": 2,
    "no-alert": 2,
    "indent": [2, 4, { "SwitchCase": 1 }],
    "no-var": 1,
    "no-cond-assign": 2,
    "no-constant-condition": 2,
    "no-empty": [2, { "allowEmptyCatch": true }],
    "no-sparse-arrays": 2,
    "no-inner-declarations": 2,
    "no-func-assign": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-case-declarations": 0,
    "no-dupe-args": 2,
    "no-else-return": 2,
    "no-redeclare": 2,
    "no-labels": 2,
    "no-delete-var": 2,
    "no-undefined": 2,
    "no-mixed-spaces-and-tabs": 2,
    "require-yield": 1,
    "arrow-spacing": 2,
    "arrow-parens": [2, "as-needed"]
  },
  "parserOptions": {
    "sourceType": "module",
    "ecmaFeatures": {
      "spread": true,
      "impliedStrict": true,
      "experimentalObjectRestSpread": true
    }
  }
}