.eslintrc.ts

module.exports = {
  env: {
    browser: true,
    es2021: true,
    node: true,
  },
  extends: ['eslint:recommended', 'plugin:react/recommended', 'plugin:@typescript-eslint/recommended'],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaFeatures: {
      jsx: true,
    },
    ecmaVersion: 'latest',
    sourceType: 'module',
    project: './tsconfig.json',
  },
  plugins: ['react', '@typescript-eslint', 'prettier'],
  settings: {
    react: {
      version: 'detect',
    },
  },
  rules: {
    // General
    'no-console': 'error',
    // TypeScript
    '@typescript-eslint/consistent-type-imports': 'error',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/explicit-member-accessibility': 'off',
    '@typescript-eslint/indent': 'off',
    '@typescript-eslint/member-delimiter-style': 'off',
    '@typescript-eslint/no-confusing-void-expression': [
      'error',
      { ignoreArrowShorthand: true, ignoreVoidOperator: true },
    ],
    'no-duplicate-imports': 'off',
    '@typescript-eslint/no-duplicate-imports': 'error',
    '@typescript-eslint/no-implicit-any-catch': 'error',
    'no-invalid-this': 'off',
    '@typescript-eslint/no-invalid-this': 'error',
    '@typescript-eslint/no-invalid-void-type': 'error',
    'no-loop-func': 'off',
    '@typescript-eslint/no-loop-func': 'error',
    'no-loss-of-precision': 'off',
    '@typescript-eslint/no-loss-of-precision': 'error',
    '@typescript-eslint/no-parameter-properties': 'off',
    'no-redeclare': 'off',
    '@typescript-eslint/no-redeclare': 'error',
    'no-shadow': 'off',
    '@typescript-eslint/no-shadow': 'error',
    'no-throw-literal': 'off',
    '@typescript-eslint/no-throw-literal': 'error',
    '@typescript-eslint/no-unnecessary-boolean-literal-compare': 'error',
    '@typescript-eslint/no-unnecessary-condition': 'error',
    '@typescript-eslint/no-unnecessary-type-arguments': 'error',
    'no-unused-expressions': 'off',
    '@typescript-eslint/no-unused-expressions': 'error',
    '@typescript-eslint/no-unused-vars': 'off',
    '@typescript-eslint/no-use-before-define': ['error', { variables: false }],
    '@typescript-eslint/prefer-enum-initializers': 'error',
    '@typescript-eslint/prefer-for-of': 'error',
    '@typescript-eslint/prefer-includes': 'error',
    '@typescript-eslint/prefer-nullish-coalescing': 'error',
    '@typescript-eslint/prefer-optional-chain': 'error',
    '@typescript-eslint/prefer-reduce-type-parameter': 'error',
    '@typescript-eslint/prefer-string-starts-ends-with': 'error',
    '@typescript-eslint/prefer-ts-expect-error': 'error',
    '@typescript-eslint/promise-function-async': 'error',
    'no-return-await': 'off',
    '@typescript-eslint/return-await': 'error',
    '@typescript-eslint/strict-boolean-expressions': 'error',
    '@typescript-eslint/switch-exhaustiveness-check': 'error',

    // React
    'react/jsx-boolean-value': 'warn',
    'react/jsx-curly-brace-presence': 'warn',
    'react/jsx-fragments': 'warn',
    'react/jsx-no-useless-fragment': 'warn',
    'react/jsx-uses-react': 'off',
    'react/prefer-stateless-function': 'warn',
    'react/prop-types': 'off',
    'react/react-in-jsx-scope': 'off',

    // Functional
    'functional/prefer-readonly-type': [
      'warn',
      {
        allowLocalMutation: true,
        allowMutableReturnType: true,
        ignoreClass: true,
      },
    ],
  },
};