.eslintrc.json

{
  "env": {
    "browser": true,
    "es2021": true
  },
  // inserts plugins installed via npm and make them available in this file -> you can use them in "rules" section
  "plugins": ["react", "@typescript-eslint", "unused-imports", "import"],
  // extend configuration with predefined rules
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:react/recommended",
    "plugin:import/typescript",
    "plugin:react/jsx-runtime",
    "plugin:react-hooks/recommended"
    // "plugin:prettier/recommended" // prettier should be at the end
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": "latest",
    "tsconfigRootDir": "./", // connection to  TypeScript config file
    "sourceType": "module"
  },
  // rules: https://eslint.org/docs/latest/rules/
  "rules": {
    "no-unused-vars": "off", // base rule must be disabled as it can report incorrect errors
    "@typescript-eslint/no-empty-function": "warn",
    "@typescript-eslint/no-namespace": "off",
    "@typescript-eslint/no-unused-vars": "warn",
    "@typescript-eslint/consistent-type-imports": [
      "error",
      {
        "prefer": "type-imports"
      }
    ], // automatically detects if imported module is type or not and formats if needed
    "unused-imports/no-unused-imports": "warn",
    "react/jsx-props-no-spreading": "warn",
    "react/self-closing-comp": [
      "error",
      {
        "component": true,
        "html": true
      }
    ],
    "accessor-pairs": "warn",
    "capitalized-comments": "off",
    "default-case": "warn",
    "default-case-last": "error",
    "dot-notation": "warn",
    "eqeqeq": "error",
    "func-style": ["error", "expression"],
    "import/no-duplicates": "error",
    "max-depth": ["warn", 3],
    "max-nested-callbacks": ["warn", 3],
    "multiline-comment-style": ["warn", "separate-lines"],
    "no-console": "warn",
    "no-else-return": ["error", { "allowElseIf": false }],
    "no-eq-null": "error",
    "no-lonely-if": "warn",
    "no-nested-ternary": "warn",
    "no-shadow": "off",
    "no-template-curly-in-string": "warn",
    "no-unreachable-loop": "warn",
    "no-use-before-define": "warn",
    "no-useless-rename": "error",
    "no-var": "error",
    "prefer-arrow-callback": "error",
    "prefer-const": "error",
    "prefer-object-spread": "error",
    "prefer-rest-params": "error",
    "prefer-template": "error",
    "require-await": "error"
  }
}