.eslintrc.js

module.exports = {
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.js', '.jsx', '.ts', '.tsx', '.d.ts'],
        paths: ['src'],
      },
    },
  },
  env: {
    browser: true,
    es2021: true,
    jest: true,
  },
  extends: ['airbnb-base', 'prettier', 'plugin:jsx-a11y/recommended'],
  plugins: ['prettier', 'jsx-a11y'],
  parserOptions: {
    ecmaVersion: 12,
    sourceType: 'module',
  },
  rules: {
    'prettier/prettier': ['error'],
    'no-param-reassign': [
      'error',
      { props: true, ignorePropertyModificationsFor: ['state'] },
    ],
    'import/no-extraneous-dependencies': 'off',
    'no-use-before-define': 'off',
    'no-shadow': 'off',
  },
  overrides: [
    {
      files: '**/*.+(ts|tsx)',
      parser: '@typescript-eslint/parser',
      parserOptions: {
        project: './tsconfig.json',
      },
      plugins: ['@typescript-eslint/eslint-plugin'],
      extends: [
        'plugin:@typescript-eslint/eslint-recommended',
        'plugin:@typescript-eslint/recommended',
        'prettier',
      ],
      rules: {
        'import/extensions': [
          'error',
          'ignorePackages',
          {
            js: 'never',
            jsx: 'never',
            ts: 'never',
            tsx: 'never',
          },
        ],
        '@typescript-eslint/no-shadow': 'error',
        '@typescript-eslint/explicit-module-boundary-types': 'off',
      },
    },
  ],
};