.eslintrc

{
  "env": {
    "node": true,
    "es6": true
  },
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "tsconfig.json"
  },
  "plugins": ["@typescript-eslint", "functional"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/recommended-requiring-type-checking",
    "plugin:functional/external-typescript-recommended",
    "plugin:functional/strict",
    "prettier"
  ],
  "rules": {
    "no-unused-vars": "off",
    "@typescript-eslint/no-unused-vars": [
      "warn",
      { "argsIgnorePattern": "^_*$" }
    ],
    "functional/no-conditional-statements": [
      "error",
      {
        "allowReturningBranches": true
      }
    ],
    "functional/functional-parameters": "off",
    "functional/prefer-immutable-types": "off",
    "functional/type-declaration-immutability": "off"
  }
}