.eslintrc.json

{
  "env": {
    "browser": true,
    "es2021": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:import/recommended",
    "plugin:react/recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/stylistic",
    "plugin:prettier/recommended"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true,
      "arrowFunctions": true
    },
    "ecmaVersion": "latest",
    "sourceType": "module",
    "project": "./tsconfig.json"
  },
  "plugins": [
    "react",
    "@typescript-eslint",
    "prefer-arrow-functions",
    "unused-imports",
    "react-hooks"
  ],
  "settings": {
    "react": {
      "version": "detect"
    },
    "import/resolver": {
      "typescript": {
        "alwaysTryTypes": true,
        "project": ["tsconfig.json", "packages/*/tsconfig.json"]
      }
    }
  },
  "rules": {
    // Stylistic
    // ---------
    "curly": "error",
    "arrow-body-style": ["error", "as-needed"],
    "comma-dangle": [
      "error",
      {
        "arrays": "always-multiline",
        "objects": "always-multiline",
        "imports": "always-multiline",
        "exports": "always-multiline",
        "functions": "never"
      }
    ],
    "object-shorthand": "error",
    "unused-imports/no-unused-imports": "error",
    "semi": [2, "always"],
    "import/extensions": [
      "error",
      "ignorePackages",
      {
        "ts": "never",
        "tsx": "never"
      }
    ],
    "prefer-arrow-functions/prefer-arrow-functions": [
      "warn",
      {
        "classPropertiesAllowed": false,
        "disallowPrototype": false,
        "returnStyle": "unchanged",
        "singleReturnOnly": false
      }
    ],
    // React
    // -----
    // "@typescript-eslint/no-unnecessary-condition": "error", // in progress
    "react/react-in-jsx-scope": "off",
    "react-hooks/rules-of-hooks": "error",
    "react/jsx-no-useless-fragment": "error",
    "react/jsx-filename-extension": [
      "warn",
      {
        "extensions": [".tsx"]
      }
    ],
    // Typescript
    // ----------
    "@typescript-eslint/consistent-type-imports": [
      "error",
      {
        "prefer": "type-imports",
        "fixStyle": "separate-type-imports"
      }
    ],
    "@typescript-eslint/no-shadow": "error"
  }
}