.eslintrc.js

module.exports = {
  root: true,
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint', 'prettier'],
  env: {
    node: true,
    es6: true,
  },
  extends: ['plugin:prettier/recommended'],
  parserOptions: {
    ecmaVersion: 2020,
    sourceType: 'module',
  },
  overrides: [
    {
      files: ['*.ts'],
      parserOptions: {
        project: ['./tsconfig.json', './packages/*/tsconfig.json'],
      },
      extends: [
        'plugin:@typescript-eslint/recommended',
        'plugin:@typescript-eslint/eslint-recommended',
        'plugin:@typescript-eslint/recommended-requiring-type-checking',
      ],
      rules: {
        '@typescript-eslint/no-unused-vars': [
          'warn', // or "error"
          {
            argsIgnorePattern: '^_',
            varsIgnorePattern: '^_',
            caughtErrorsIgnorePattern: '^_',
          },
        ],
      },
    },
  ],
}