.eslintrc

{
  "root": true,
  "env": {
    "browser": true,
    "node": true,
    "es6": true,
    "jest": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/recommended-requiring-type-checking",
    "plugin:prettier/recommended"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "tsconfig.json"
  },
  "plugins": ["import"],
  "rules": {
    "@typescript-eslint/prefer-optional-chain": "error",
    "@typescript-eslint/prefer-nullish-coalescing": "error",
    "@typescript-eslint/strict-boolean-expressions": "error",
    "curly": ["error", "all"],
    "eqeqeq": ["error", "smart"],
    "max-lines": ["error", 200],
    "max-params": ["error", 4],
    "import/no-extraneous-dependencies": [
      "error",
      {
        "devDependencies": true,
        "optionalDependencies": false,
        "peerDependencies": false
      }
    ],
    "no-shadow": "off",
    "prefer-const": "error",
    "import/order": [
      "error",
      {
        "groups": [["external", "builtin"], "internal", ["parent", "sibling", "index"]]
      }
    ],
    "sort-imports": [
      "error",
      {
        "ignoreCase": true,
        "ignoreDeclarationSort": true,
        "ignoreMemberSort": false,
        "memberSyntaxSortOrder": ["none", "all", "multiple", "single"]
      }
    ]
  }
}