.eslintrc.js

module.exports = {
  ignorePatterns: ['.eslintrc.js', 'jest.config.js'],
  env: {
    browser: false,
    es2021: true
  },
  extends: [
    /*'eslint:recommended',
    'plugin:@typescript-eslint/recommended'*/
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: ['tsconfig.json', 'tests/tsconfig.json' ],
    tsconfigRootDir: __dirname,
    ecmaVersion: 12,
    sourceType: 'module'
  },
  plugins: [
    '@typescript-eslint'
  ],
  rules: {
    indent: [
      'error',
      2
    ],
    'linebreak-style': [
      'error',
      'unix'
    ],
    quotes: [
      'error',
      'single'
    ],
    semi: [
      'error',
      'never'
    ],
    '@typescript-eslint/strict-boolean-expressions': [
      'error',
      {
        allowString: true,
        allowNumber: true,
        allowNullableObject: true,
        allowNullableNumber: false,
        allowNullableString: true,
        allowAny: false
      }
    ],
    '@typescript-eslint/no-unnecessary-type-assertion': ['error'],
    '@typescript-eslint/no-confusing-non-null-assertion': ['error'],
    '@typescript-eslint/no-extra-non-null-assertion': ['error'],
    '@typescript-eslint/non-nullable-type-assertion-style': ['error'],
    '@typescript-eslint/consistent-type-assertions': [
      'error',
      {
        assertionStyle: 'as',
        objectLiteralTypeAssertions: 'never'
      }
    ],
    '@typescript-eslint/no-explicit-any': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/ban-types': 'off',
    '@typescript-eslint/no-unused-vars': 'off'
  }
}