node.js

module.exports = {
  parser: "espree",
  extends: [
    "plugin:jest/recommended",
    "plugin:node/recommended",
    "plugin:promise/recommended",
    "plugin:you-dont-need-lodash-underscore/compatible-warn"
  ],
  env: {
    "es6": true,
    "jest/globals": true,
    "node": true
  },
  parserOptions: {
    ecmaVersion: 2020,
    ecmaFeatures: {
      impliedStrict: true
    }
  },
  plugins: [
    "import",
    "jest",
    "promise",
    "you-dont-need-lodash-underscore"
  ],
  rules: {
    "array-bracket-spacing": [
      "error",
      "never"
    ],
    "array-callback-return": [
      "error",
      {
        allowImplicit: true
      }
    ],
    "arrow-body-style": [
      "error",
      "as-needed",
      {
        requireReturnForObjectLiteral: false
      }
    ],
    "arrow-parens": [
      "error",
      "always",
      {
        requireForBlockBody: true
      }
    ],
    "arrow-spacing": [
      "error",
      {
        after: true,
        before: true
      }
    ],
    "block-scoped-var": "off",
    "block-spacing": [
      "error",
      "always"
    ],
    "brace-style": [
      "error",
      "1tbs",
      {
        allowSingleLine: true
      }
    ],
    "camelcase": [
      "error",
      {
        properties: "always"
      }
    ],
    "comma-dangle": [
      "error",
      "never"
    ],
    "comma-spacing": [
      "error",
      {
        after: true,
        before: false
      }
    ],
    "comma-style": [
      "error",
      "last"
    ],
    "computed-property-spacing": [
      "error",
      "never"
    ],
    "consistent-return": [
      "error",
      {
        treatUndefinedAsUnspecified: true
      }
    ],
    "curly": [
      "error",
      "multi-line"
    ],
    "default-case": "error",
    "dot-location": [
      "error",
      "property"
    ],
    "dot-notation": [
      "error",
      {
        allowKeywords: true
      }
    ],
    "eol-last": "error",
    "eqeqeq": "error",
    "func-names": "off",
    "func-style": [
      "error",
      "declaration",
      {
        allowArrowFunctions: true
      }
    ],
    "function-paren-newline": [
      "error",
      "multiline"
    ],
    "guard-for-in": "error",
    "id-length": [
      "error",
      {
        exceptions: [
          "_"
        ]
      }
    ],
    "import/export": "error",
    "import/newline-after-import": "error",
    "import/no-duplicates": "error",
    "import/no-mutable-exports": "error",
    "import/no-named-default": "error",
    "import/order": [
      "error",
      {
        groups: [
          "builtin",
          "external",
          "internal",
          "parent",
          "sibling",
          "index"
        ]
      }
    ],
    "indent": [
      "error",
      2,
      {
        SwitchCase: 1
      }
    ],
    "key-spacing": [
      "error",
      {
        afterColon: true,
        beforeColon: false
      }
    ],
    "keyword-spacing": "error",
    "max-len": [
      "error",
      160,
      2,
      {
        ignoreComments: true,
        ignoreUrls: true
      }
    ],
    "new-cap": [
      "off",
      {
        capIsNewExceptions: [
          "Match",
          "OneOf",
          "Optional"
        ],
        newIsCap: true
      }
    ],
    "new-parens": "error",
    "newline-per-chained-call": [
      "error",
      {
        ignoreChainWithDepth: 4
      }
    ],
    "no-alert": "error",
    "no-array-constructor": "error",
    "no-await-in-loop": "error",
    "no-bitwise": "error",
    "no-caller": "error",
    "no-case-declarations": "error",
    "no-cond-assign": [
      "error",
      "always"
    ],
    "no-confusing-arrow": [
      "error",
      {
        allowParens: true
      }
    ],
    "no-console": "error",
    "no-const-assign": "error",
    "no-constant-condition": "error",
    "no-debugger": "error",
    "no-dupe-keys": "error",
    "no-duplicate-case": "error",
    "no-else-return": "error",
    "no-empty": "error",
    "no-empty-pattern": "error",
    "no-eq-null": "error",
    "no-eval": "error",
    "no-ex-assign": "error",
    "no-extend-native": "error",
    "no-extra-bind": "error",
    "no-extra-boolean-cast": "error",
    "no-extra-parens": [
      "error",
      "functions"
    ],
    "no-extra-semi": "error",
    "no-fallthrough": "error",
    "no-floating-decimal": "error",
    "no-func-assign": "error",
    "no-implicit-globals": "error",
    "no-implied-eval": "error",
    "no-inner-declarations": "error",
    "no-invalid-regexp": "error",
    "no-irregular-whitespace": "error",
    "no-lone-blocks": "error",
    "no-lonely-if": "error",
    "no-loop-func": "error",
    "no-mixed-operators": [
      "error",
      {
        allowSamePrecedence: false,
        groups: [
          [
            "%",
            "**"
          ],
          [
            "%",
            "+"
          ],
          [
            "%",
            "-"
          ],
          [
            "%",
            "*"
          ],
          [
            "%",
            "/"
          ],
          [
            "**",
            "+"
          ],
          [
            "**",
            "-"
          ],
          [
            "**",
            "*"
          ],
          [
            "**",
            "/"
          ],
          [
            "&",
            "|",
            "^",
            "~",
            "<<",
            ">>",
            ">>>"
          ],
          [
            "==",
            "!=",
            "===",
            "!==",
            ">",
            ">=",
            "<",
            "<="
          ],
          [
            "&&",
            "||"
          ],
          [
            "in",
            "instanceof"
          ]
        ]
      }
    ],
    "no-multi-assign": [
      "error"
    ],
    "no-multi-spaces": [
      "error",
      {
        ignoreEOLComments: false
      }
    ],
    "no-multi-str": "error",
    "no-multiple-empty-lines": [
      "error",
      {
        max: 2
      }
    ],
    "no-native-reassign": "error",
    "no-nested-ternary": "error",
    "no-new": "error",
    "no-new-func": "error",
    "no-new-object": "error",
    "no-new-wrappers": "error",
    "no-obj-calls": "error",
    "no-octal": "error",
    "no-octal-escape": "error",
    "no-param-reassign": "error",
    "no-plusplus": "error",
    "no-proto": "error",
    "no-prototype-builtins": "error",
    "no-redeclare": "error",
    "no-return-assign": [
      "error",
      "always"
    ],
    "no-return-await": "error",
    "no-script-url": "error",
    "no-self-compare": "error",
    "no-sequences": "error",
    "no-shadow": "error",
    "no-shadow-restricted-names": "error",
    "no-spaced-func": "error",
    "no-sparse-arrays": "error",
    "no-tabs": "error",
    "no-throw-literal": "error",
    "no-trailing-spaces": "error",
    "no-undef": "error",
    "no-undef-init": "error",
    "no-underscore-dangle": "off",
    "no-unneeded-ternary": [
      "error",
      {
        defaultAssignment: false
      }
    ],
    "no-unreachable": "error",
    "no-unsafe-finally": "error",
    "no-unused-vars": [
      "error",
      {
        args: "after-used",
        ignoreRestSiblings: true,
        vars: "all"
      }
    ],
    "no-use-before-define": [
      "error",
      "nofunc"
    ],
    "no-useless-computed-key": "error",
    "no-useless-concat": "error",
    "no-useless-constructor": "error",
    "no-useless-escape": "error",
    "no-var": "error",
    "no-void": "error",
    "no-with": "error",
    "node/no-missing-import": "off",
    "node/no-missing-require": "off",
    "node/no-unsupported-features/es-syntax": "off",
    "node/no-unpublished-import": "off",
    "node/no-unpublished-require": "off",
    "object-curly-newline": [
      "error",
      {
        ObjectExpression: {
          consistent: true,
          multiline: true
        },
        ObjectPattern: {
          consistent: true,
          multiline: true
        }
      }
    ],
    "object-curly-spacing": [
      "error",
      "always",
      {
        objectsInObjects: true
      }
    ],
    "object-property-newline": [
      "error",
      {
        allowAllPropertiesOnSameLine: true
      }
    ],
    "object-shorthand": [
      "error",
      "always"
    ],
    "one-var": [
      "error",
      "never"
    ],
    "operator-assignment": [
      "error",
      "always"
    ],
    "padded-blocks": [
      "error",
      "never"
    ],
    "prefer-arrow-callback": [
      "error",
      {
        allowNamedFunctions: false,
        allowUnboundThis: true
      }
    ],
    "prefer-const": [
      "error",
      {
        destructuring: "any",
        ignoreReadBeforeAssign: false
      }
    ],
    "prefer-destructuring": [
      "error",
      {
        AssignmentExpression: {
          array: true,
          object: true
        },
        VariableDeclarator: {
          array: false,
          object: true
        }
      },
      {
        enforceForRenamedProperties: false
      }
    ],
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "prefer-template": "error",
    "quote-props": [
      "error",
      "consistent-as-needed"
    ],
    "quotes": [
      "error",
      "double",
      {
        avoidEscape: true
      }
    ],
    "radix": "error",
    "require-jsdoc": [
      "error",
      {
        require: {
          ArrowFunctionExpression: false,
          ClassDeclaration: false,
          FunctionDeclaration: true,
          MethodDefinition: false
        }
      }
    ],
    "rest-spread-spacing": [
      "error",
      "never"
    ],
    "semi": [
      "error",
      "always"
    ],
    "semi-spacing": [
      "error",
      {
        after: true,
        before: false
      }
    ],
    "space-before-blocks": "error",
    "space-before-function-paren": [
      "error",
      {
        anonymous: "always",
        named: "never"
      }
    ],
    "space-in-parens": [
      "error",
      "never"
    ],
    "space-infix-ops": "error",
    "space-unary-ops": [
      "error",
      {
        nonwords: false,
        overrides: {},
        words: true
      }
    ],
    "spaced-comment": [
      "error",
      "always"
    ],
    "strict": "off",
    "template-curly-spacing": "error",
    "use-isnan": "error",
    "valid-jsdoc": [
      "error",
      {
        prefer: {
          arg: "param",
          argument: "param"
        }
      }
    ],
    "vars-on-top": "error",
    "wrap-iife": [
      "error",
      "outside",
      {
        functionPrototypeMethods: false
      }
    ],
    "yoda": "error"
  }
};