.eslintrc.json

{
  "env": {
    "node": true
  },
  "rules": {
    "array-bracket-spacing": ["error", "never"],
    "block-scoped-var": "error",
    "brace-style": ["error", "1tbs"],
    "camelcase": "warn",
    "computed-property-spacing": ["error", "never"],
    "curly": ["error", "multi-line"],
    "eol-last": "error",
    "eqeqeq": ["error", "smart"],
    "max-depth": ["warn", 3],
    "max-len": ["warn", 110, {"ignoreUrls": true}],
    "max-statements": ["warn", 15],
    "new-cap": "warn",
    "no-extend-native": "error",
    "no-mixed-spaces-and-tabs": "error",
    "no-trailing-spaces": "error",
    "no-unused-vars": ["warn", {"argsIgnorePattern": "^(err|error|req|res)$"}],
    "no-use-before-define": ["error", "nofunc"],
    "object-curly-spacing": ["error", "always"],
    "quotes": ["error", "single", "avoid-escape"],
    "semi": ["error", "always"],
    "keyword-spacing": ["error", {"before": true, "after": true}],
    "space-unary-ops": "warn",

    "comma-dangle": "error",
    "no-cond-assign": "error",
    "no-console": "error",
    "no-constant-condition": "error",
    "no-control-regex": "error",
    "no-debugger": "error",
    "no-dupe-args": "error",
    "no-dupe-keys": "error",
    "no-duplicate-case": "error",
    "no-empty-character-class": "error",
    "no-empty": "error",
    "no-ex-assign": "error",
    "no-extra-boolean-cast": "error",
    "no-extra-parens": "warn",
    "no-extra-semi": "error",
    "no-func-assign": "error",
    "no-inner-declarations": "error",
    "no-invalid-regexp": "error",
    "no-irregular-whitespace": "error",
    "no-negated-in-lhs": "error",
    "no-obj-calls": "error",
    "no-regex-spaces": "error",
    "no-sparse-arrays": "error",
    "no-unreachable": "error",
    "use-isnan": "error",
    "valid-typeof": "error",
    "no-unexpected-multiline": "error",

    "dot-location": ["error", "property"],
    "guard-for-in": "error",
    "no-alert": "error",
    "no-case-declarations": "error",
    "no-else-return": "error",
    "no-empty-function": "error",
    "no-eval": "error",
    "no-extra-bind": "error",
    "no-extra-label": "error",
    "no-fallthrough": "error",
    "no-floating-decimal": "error",
    "no-implicit-coercion": "error",
    "no-implied-eval": "error",
    "no-invalid-this": "error",
    "no-loop-func": "error",
    "no-multi-spaces": "error",
    "no-redeclare": "error",
    "no-return-assign": "error",
    "no-self-assign": "error",
    "no-self-compare": "error",
    "no-useless-call": "error",
    "no-useless-concat": "error",
    "no-warning-comments": "error",
    "wrap-iife": "error",

    "strict": ["error", "safe"],

    "no-delete-var": "error",
    "no-label-var": "error",
    "no-undef": "error",
    "no-undefined": "error",

    "global-require": "error",
    "handle-callback-err": ["error", "^(err|error)$"],
    "no-new-require": "error",
    "no-path-concat": "error",

    "block-spacing": "error",
    "comma-spacing": "error",
    "comma-style": "error",
    "key-spacing": "error",
    "max-nested-callbacks": ["warn", 4],
    "no-whitespace-before-property": "error",
    "quote-props": ["error", "as-needed"],
    "semi-spacing": "error",
    "space-before-blocks": "error",
    "space-before-function-paren": ["error", "never"],
    "space-in-parens": "error",
    "space-infix-ops": "error",
    "spaced-comment": "error",

    "indent": ["error", 2, { "MemberExpression": "off" }]
  }
}