.eslintrc.js

module.exports = {
  extends: [
    'react-app',
    'plugin:import/typescript',
    'plugin:jest/recommended',
    'prettier',
  ],
  plugins: ['prettier', 'react', 'react-hooks', '@typescript-eslint', 'jest'],
  parser: 'babel-eslint',
  parserOptions: {
    ecmaVersion: 6,
    sourceType: 'module',
    ecmaFeatures: {
      jsx: true,
    },
  },
  env: {
    es6: true,
    browser: true,
    node: true,
    jest: true,
  },
  rules: {
    'array-callback-return': 'off',
    'arrow-parens': 'off',
    'comma-dangle': 'off',
    'consistent-return': 'off',
    eqeqeq: 'off',
    'function-paren-newline': 'off',
    'import/extensions': 'error',
    'import/first': 'error',
    'import/order': 'error',
    'import/no-deprecated': 'error',
    'import/no-duplicates': 'error',
    'import/no-extraneous-dependencies': 'off',
    'import/no-named-as-default': 'off',
    'import/no-unresolved': 'error',
    'import/prefer-default-export': 'off',
    'jest/consistent-test-it': [
      'error',
      {
        fn: 'it',
        withinDescribe: 'it',
      },
    ],
    'jest/no-disabled-tests': 'error',
    'jest/no-mocks-import': 'off',
    indent: 'off', // in conflict with prettier
    'jsx-a11y/anchor-is-valid': 'off',
    'jsx-a11y/no-redundant-roles': 'off',
    'max-len': 0, // in conflict with prettier
    'no-confusing-arrow': 'off',
    'no-else-return': 'error',
    'no-nested-ternary': 'off',
    'no-return-assign': 'off',
    'no-param-reassign': 'off',
    'no-undef': 'error',
    'no-unused-vars': 'error',
    'no-use-before-define': 'error',
    'object-curly-newline': 'off',
    'prefer-const': 'error',
    'prefer-destructuring': 'error',
    'prefer-rest-params': 'off',
    'prettier/prettier': 'error',
    'react/default-props-match-prop-types': 'off',
    'react/forbid-prop-types': 'off',
    'react/jsx-boolean-value': 2,
    'react/jsx-filename-extension': 'off',
    'react/jsx-uses-react': 2,
    'react/jsx-uses-vars': 2,
    'react/no-array-index-key': 2,
    'react/no-unescaped-entities': 'off',
    'react/no-unused-state': 'off',
    'react/prefer-stateless-function': 'error',
    'react/prop-types': 'error',
    'react/require-default-props': 2,
    'react/sort-comp': 2,
    semi: 'off',
    'react-hooks/rules-of-hooks': 'error', // Checks rules of Hooks
    'react-hooks/exhaustive-deps': 'warn', // Checks effect dependencies
  },
  overrides: [
    {
      files: ['**/*.ts', '**/*.tsx'],
      rules: {
        'react/prop-types': 'off',
        '@typescript-eslint/no-unused-vars': [
          'error',
          {
            args: 'none',
            ignoreRestSiblings: true,
          },
        ],
      },
      parser: '@typescript-eslint/parser',
      parserOptions: {
        ecmaVersion: 2018,
        sourceType: 'module',
        ecmaFeatures: { jsx: true },
        warnOnUnsupportedTypeScriptVersion: true,
      },
    },
  ],
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.js', '.jsx', '.ts', '.tsx'],
      },
    },
  },
}