.eslintrc.json

{
  "extends": "airbnb-base",

  "env": {
    "node": true,
    "mocha": true,
    "es6": true
  },

  "parserOptions": {
    "ecmaVersion": 2021,
    "sourceType": "script",
    "ecmaFeatures": {
      "impliedStrict": true
    }
  },

  "plugins": [
    "chai-friendly",
    "import",
    "mocha",
    "node",
    "promise"
  ],

  "rules": {
    "indent": [
      "error",
      4,
      {
        "SwitchCase": 1,
        "VariableDeclarator": 1
      }
    ],
    "func-names": [
      "error",
      "never"
    ],
    "quotes": [
      "error",
      "single",
      {
        "allowTemplateLiterals": true
      }
    ],
    "max-len": [
      2,
      {
        "code": 180,
        "tabWidth": 4,
        "ignoreUrls": true
      }
    ],
    "no-use-before-define": "off",
    "no-plusplus": "off",
    "consistent-return": "warn",
    "class-methods-use-this": "off",
    "no-underscore-dangle": "off",
    "no-multi-spaces": "off",
    "no-param-reassign": "off",
    "no-else-return": "off",
    "arrow-body-style": "off",
    "strict": [
      "error",
      "global"
    ],
    "padded-blocks": "off",
    "import/no-extraneous-dependencies": [
      2,
      {
        "devDependencies": true
      }
    ],
    "guard-for-in": "error",
    "no-console": "off",
    "comma-dangle": ["error", "only-multiline"],
    "quote-props": ["error", "consistent"],

    "promise/catch-or-return": ["error", { "allowThen": true }],

    "mocha/no-exclusive-tests": "error",

    "no-unused-expressions": "off",
    "chai-friendly/no-unused-expressions": "error",

    "node/no-unsupported-features": "error",
    "node/process-exit-as-throw": "error",
    "node/shebang": "off",
    "node/no-deprecated-api": "warn",
    "no-useless-constructor": "warn",
    "no-return-await": "off"
  },

  "overrides": [
    {
      "files": ["**/*.ts"],
      "parser": "@typescript-eslint/parser",
      "plugins": ["@typescript-eslint/eslint-plugin"],
      "extends": ["plugin:@typescript-eslint/recommended"],
      "parserOptions": {
        "project": "tsconfig.json",
        "sourceType": "module"
      },
      "env": {
        "node": true
      },
      "rules": {
        "no-restricted-syntax": "warn",
        "import/prefer-default-export": "off",
        "node/no-unsupported-features": "off",
        "node/no-unsupported-features/es-builtins": "error",
        "node/no-unsupported-features/es-syntax": ["error", {
          "ignores": ["modules"]
        }],
        "node/no-unsupported-features/node-builtins": "error",
        "no-empty-function":  "warn",
        "lines-between-class-members": "off",
        "@typescript-eslint/no-explicit-any": "warn",
        "@typescript-eslint/no-var-requires": "warn",
        "@typescript-eslint/no-unused-vars": ["error", {
          "argsIgnorePattern": "^_",
          "varsIgnorePattern": "^_",
          "caughtErrorsIgnorePattern": "^_"
        }
        ]
      }
    }
  ]
}