.eslintrc.json

{
  "root": true,
  "plugins": ["@typescript-eslint", "jest"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/recommended-requiring-type-checking",
    "prettier"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "./tsconfig.json",
    "sourceType": "module"
  },
  "env": {
    "es6": true,
    "node": true
  },
  "rules": {
    "complexity": ["warn"],
    "curly": ["error"],
    "default-case": ["error"],
    "guard-for-in": ["error"],
    "no-array-constructor": ["error"],
    "no-else-return": [
      "warn",
      {
        "allowElseIf": false
      }
    ],
    "no-implicit-coercion": ["warn"],
    "no-lonely-if": ["error"],
    "no-loop-func": ["error"],
    "no-magic-numbers": ["warn"],
    "no-nested-ternary": ["warn"],
    "no-new-object": ["error"],
    "no-param-reassign": ["warn"],
    "no-process-env": ["error"],
    "no-return-assign": ["error"],
    "no-self-compare": ["error"],
    "no-sequences": ["error"],
    "no-unmodified-loop-condition": ["error"],
    "no-unneeded-ternary": ["warn"],
    "no-useless-call": ["error"],
    "no-useless-computed-key": ["warn"],
    "no-useless-rename": ["warn"],
    "no-warning-comments": [
      "error",
      {
        "terms": ["fixme", "fix"]
      }
    ],
    "object-shorthand": ["warn"],
    "prefer-const": ["error"],
    "prefer-rest-params": ["error"],
    "prefer-spread": ["warn"],
    "prefer-template": ["warn"],
    "radix": ["error"],
    "spaced-comment": ["warn"],
    "yoda": ["warn"],
    "@typescript-eslint/array-type": [
      "error",
      {
        "array-simple": true
      }
    ],
    "@typescript-eslint/strict-boolean-expressions": [
      "error",
      {
        "allowString": false,
        "allowNumber": false
      }
    ]
  },
  "overrides": [
    {
      "files": ["tests/**/*.ts"],
      "rules": {
        "no-magic-numbers": "off"
      }
    }
  ]
}