.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": 2019,
    "sourceType": "module",
    "project": "./tsconfig.json"
  },
  "ignorePatterns": [
    "node_modules/",
    "functions/node_modules/",
    "functions/dist/",
    "functions/generated/",
    "app/node_modules/",
    "app/dist/"
  ],
  "env": {
    "node": true,
    "es6": true
  },
  "plugins": [
    "@typescript-eslint",
    "prettier",
    "react",
    "react-hooks",
    "header"
  ],
  "rules": {
    "@typescript-eslint/no-unused-vars": [
      "warn",
      { "argsIgnorePattern": "^unused" }
    ],
    "react/jsx-uses-vars": "warn",
    "react/jsx-uses-react": "warn",
    "react-hooks/rules-of-hooks": "warn",
    "react-hooks/exhaustive-deps": "warn",
    "prettier/prettier": "warn",
    "no-console": ["warn", { "allow": ["warn", "error"] }],
    "no-alert": "warn",
    "no-debugger": "warn",
    "no-var": "warn",
    "prefer-const": "warn",
    "prefer-rest-params": "warn",
    "prefer-spread": "warn",
    "eqeqeq": "warn",
    "@typescript-eslint/await-thenable": "warn",
    "@typescript-eslint/no-for-in-array": "warn",
    "@typescript-eslint/no-misused-promises": "warn",
    "@typescript-eslint/no-unnecessary-type-assertion": "warn",
    "@typescript-eslint/prefer-includes": "warn",
    "@typescript-eslint/prefer-string-starts-ends-with": "warn",
    "header/header": [
      "warn",
      "block",
      [
        "*",
        " * @license",
        " * Copyright 2019 Google LLC",
        " *",
        " * Use of this source code is governed by an MIT-style license that can be",
        " * found in the LICENSE file or at https://opensource.org/licenses/MIT.",
        " "
      ]
    ]
  }
}