.eslintrc.json

{
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "airbnb-base",
    "airbnb-typescript/base",
    "prettier"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": ["tsconfig.json"]
  },
  "plugins": ["@typescript-eslint"],
  "rules": {
    "import/order": [
      "error",
      {
        "groups": ["builtin", "external", "internal"],
        "pathGroups": [
          {
            "pattern": "src/**",
            "group": "internal"
          }
        ],
        "pathGroupsExcludedImportTypes": ["builtin"],
        "newlines-between": "always"
      }
    ],
    "@typescript-eslint/explicit-function-return-type": "error",
    "import/prefer-default-export": "off",
    "@typescript-eslint/no-unused-vars": "warn",
    "import/no-extraneous-dependencies": [
      "error",
      { "devDependencies": ["**/test/*.ts", "**/*.config.ts"] }
    ],
    "max-classes-per-file": "off",
    // Overwrite no-restricted-syntax to allow for...of loops
    "no-restricted-syntax": [
      "error",
      {
        "selector": "ForInStatement",
        "message": "for..in loops iterate over the entire prototype chain, which is virtually never what you want. Use Object.{keys,values,entries}, and iterate over the resulting array."
      },
      {
        "selector": "LabeledStatement",
        "message": "Labels are a form of GOTO; using them makes code confusing and hard to maintain and understand."
      },
      {
        "selector": "WithStatement",
        "message": "`with` is disallowed in strict mode because it makes code impossible to predict and optimize."
      }
    ]
  },
  "settings": {
    "import/resolver": {
      "typescript": {}
    }
  }
}