.eslintrc.json

{
    "extends": "eslint:recommended",
    "parserOptions": {
      "ecmaVersion": 2018
    },
    "env": {
      "es6": true,
      "node": true
    },
    "rules": {
      "strict": ["error", "global"],
      "no-await-in-loop": "warn",
      "no-compare-neg-zero": "error",
      "no-extra-parens": ["warn", "all", {
        "nestedBinaryExpressions": false
      }],
      "no-template-curly-in-string": "error",
      "no-unsafe-negation": "error",
      "valid-jsdoc": ["error", {
        "requireReturn": false,
        "requireReturnDescription": false,
        "prefer": {
          "return": "returns",
          "arg": "param"
        },
        "preferType": {
          "String": "string",
          "Number": "number",
          "Boolean": "boolean",
          "Symbol": "symbol",
          "object": "Object",
          "function": "Function",
          "array": "Array",
          "date": "Date",
          "error": "Error",
          "null": "void"
        }
      }],
  
      "accessor-pairs": "warn",
      "array-callback-return": "error",
      "complexity": "warn",
      "consistent-return": "error",
      "curly": ["error", "multi-line", "consistent"],
      "dot-location": ["error", "property"],
      "dot-notation": "error",
      "eqeqeq": "error",
      "no-empty-function": "error",
      "no-floating-decimal": "error",
      "no-implied-eval": "error",
      "no-invalid-this": "error",
      "no-lone-blocks": "error",
      "no-multi-spaces": "error",
      "no-new-func": "error",
      "no-new-wrappers": "error",
      "no-new": "error",
      "no-octal-escape": "error",
      "no-return-assign": "error",
      "no-return-await": "error",
      "no-self-compare": "error",
      "no-sequences": "error",
      "no-throw-literal": "error",
      "no-unmodified-loop-condition": "error",
      "no-unused-expressions": "error",
      "no-useless-call": "error",
      "no-useless-concat": "error",
      "no-useless-escape": "error",
      "no-useless-return": "error",
      "no-void": "error",
      "no-warning-comments": "warn",
      "prefer-promise-reject-errors": "error",
      "require-await": "warn",
      "wrap-iife": "error",
      "yoda": "error",
  
      "no-label-var": "error",
      "no-shadow": "error",
      "no-undef-init": "error",
  
      "callback-return": "error",
      "getter-return": "off",
      "handle-callback-err": "error",
      "no-mixed-requires": "error",
      "no-new-require": "error",
      "no-path-concat": "error",
  
      "array-bracket-spacing": "error",
      "block-spacing": "error",
      "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
      "capitalized-comments": ["error", "always", { "ignoreConsecutiveComments": true }],
      "comma-dangle": ["error", "always-multiline"],
      "comma-spacing": "error",
      "comma-style": "error",
      "computed-property-spacing": "error",
      "consistent-this": ["error", "$this"],
      "eol-last": "error",
      "func-names": "error",
      "func-name-matching": "error",
      "func-style": ["error", "declaration", { "allowArrowFunctions": true }],
      "indent": ["error", 2, { "SwitchCase": 1 }],
      "key-spacing": "error",
      "keyword-spacing": "error",
      "max-depth": "error",
      "max-len": ["error", 120, 2],
      "max-nested-callbacks": ["error", { "max": 4 }],
      "max-statements-per-line": ["error", { "max": 2 }],
      "new-cap": "off",
      "newline-per-chained-call": ["error", { "ignoreChainWithDepth": 3 }],
      "no-array-constructor": "error",
      "no-inline-comments": "error",
      "no-lonely-if": "error",
      "no-mixed-operators": "error",
      "no-multiple-empty-lines": ["error", { "max": 2, "maxEOF": 1, "maxBOF": 0 }],
      "no-new-object": "error",
      "no-spaced-func": "error",
      "no-trailing-spaces": "error",
      "no-unneeded-ternary": "error",
      "no-whitespace-before-property": "error",
      "nonblock-statement-body-position": "error",
      "object-curly-spacing": ["error", "always"],
      "operator-assignment": "error",
      "operator-linebreak": ["error", "after"],
      "padded-blocks": ["error", "never"],
      "quote-props": ["error", "as-needed"],
      "quotes": ["error", "single", { "avoidEscape": true, "allowTemplateLiterals": true }],
      "semi-spacing": "error",
      "semi": "error",
      "space-before-blocks": "error",
      "space-before-function-paren": ["error", {
        "anonymous": "never",
        "named": "never",
        "asyncArrow": "always"
      }],
      "space-in-parens": "error",
      "space-infix-ops": "error",
      "space-unary-ops": "error",
      "spaced-comment": "error",
      "template-tag-spacing": "error",
      "unicode-bom": "error",
  
      "arrow-body-style": "error",
      "arrow-parens": ["error", "as-needed"],
      "arrow-spacing": "error",
      "no-duplicate-imports": "error",
      "no-useless-computed-key": "error",
      "no-useless-constructor": "error",
      "prefer-arrow-callback": "error",
      "prefer-numeric-literals": "error",
      "prefer-rest-params": "error",
      "prefer-spread": "error",
      "prefer-template": "error",
      "rest-spread-spacing": "error",
      "template-curly-spacing": "error",
      "yield-star-spacing": "error"
    }
  }