.eslintrc.json

{
  "env": {
    "browser": false,
    "node": true,
    "es6": true,
    "mocha": true
  },
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType": "module"
  },
  "settings": {
    "import/resolver": {
      "node": { "extensions": [".js", ".mjs"] }
    }
  },
  "extends": [
    "eslint:recommended",
    "plugin:import/errors",
    "plugin:import/warnings"
  ],
  "rules": {
    "valid-jsdoc": ["error", {
      "requireReturn": true,
      "requireReturnType": true,
      "requireParamDescription": true,
      "requireReturnDescription": true,
      "preferType": {
        "String": "string",
        "object": "Object"
      }
    }],
    "require-jsdoc": ["warn", {
      "require": {
          "FunctionDeclaration": true,
          "MethodDefinition": true,
          "ClassDeclaration": true
      }
    }],
    "no-var": 1,
    "no-eval": "error",
    "indent": ["error", 2],
    "quotes": ["error", "single"],
    "no-console": "off",
    "no-restricted-syntax": [
      "error",
      {
        "selector": "CallExpression[callee.object.name='console'][callee.property.name!=/^(log|warn|error|info|trace)$/]",
        "message": "Unexpected property on console object was called"
      }
    ],
    "space-before-function-paren": ["error", "always"],
    "padded-blocks": ["error", "never"],
    "no-prototype-builtins": "off",
    "prefer-arrow-callback": [0, { "allowNamedFunctions": true }],
    "func-names": ["error", "never"],
    "no-use-before-define": [
      "off", {
        "functions": false,
        "classes": true
      }
    ],
    "max-nested-callbacks": [
      "error",
      5
    ]
  }
}