.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es2020: true
  },
  extends: [
    'standard',
    'prettier',
    'plugin:react/recommended',
    'plugin:prettier/recommended'
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 12,
    sourceType: 'module'
  },
  plugins: ['@typescript-eslint'],
  rules: {
    'prettier/prettier': [
      'warn',
      { singleQuote: true, trailingComma: 'none', quoteProps: 'consistent' }
    ],
    'react/prop-types': 'off',
    'react/jsx-uses-react': 'off',
    'react/react-in-jsx-scope': 'off',
    'no-unused-vars': 'off',
    '@typescript-eslint/no-unused-vars': 'error',
    'no-useless-constructor': 'off',
    '@typescript-eslint/no-useless-constructor': 'error',
    'max-len': 'off',
    'no-underscore-dangle': 'off',
    semi: 'off',
    '@typescript-eslint/semi': 'error',
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        jsx: 'never',
        ts: 'never',
        tsx: 'never'
      }
    ]
  },
  settings: {
    react: {
      version: 'detect'
    },
    'import/resolver': {
      typescript: {} // this loads <rootdir>/tsconfig.json to eslint
    }
  }
};