.eslintrc.js

module.exports = {
  env: {
    browser: false,
    es6: true,
    node: true,
  },
  extends: ['eslint:recommended', 'prettier'],
  plugins: ['import', '@typescript-eslint'],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 2020,
    sourceType: 'module',
    ecmaFeatures: {
      jsx: false,
    },
  },
  globals: {},
  rules: {
    'no-empty': 'warn',
    'no-redeclare': 'off',
    // note you must disable the base rule as it can report incorrect errors
    'no-unused-vars': 'off',
    '@typescript-eslint/no-unused-vars': [
      'warn',
      {
        vars: 'all',
        args: 'after-used',
        ignoreRestSiblings: false,
      },
    ],
  },
  ignorePatterns: ['dist', 'node_modules'],
  overrides: [
    {
      files: ['**/*.test.js', '**/*.test.ts'],
      env: {
        jest: true,
      },
      rules: {
        '@typescript-eslint/no-unused-vars': 'off',
        'no-unused-vars': 'off',
        'no-undef': 'off',
        'no-empty': 'off',
      },
    },
  ],
};