.eslintrc.js

module.exports = {
  root: true,
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint/eslint-plugin'],
  extends: ['eslint:recommended', 'plugin:@typescript-eslint/recommended', 'prettier'],
  env: {
    node: true,
    jest: true,
  },
  ignorePatterns: ['.eslintrc.js'],
  parserOptions: {
    project: 'tsconfig.json',
    sourceType: 'module',
  },
  rules: {
    '@typescript-eslint/interface-name-prefix': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/no-explicit-any': 'off',
    '@typescript-eslint/no-var-requires': 'off',
    // custom rules
    'no-plusplus': ['error', { allowForLoopAfterthoughts: true }], // allow for unary operators in loops
    'import/prefer-default-export': 'off', // disabling to allow to keep barrel files more concise and clear
    'func-names': 'error', // to keep clear what the function name is. If no name is needed, use () => {}
    'no-restricted-syntax': [
      'error',
      {
        selector: 'ForInStatement',
        message:
          'for..in loops iterate over the entire prototype chain, which is virtually never what you want. Use Object.{keys,values,entries}, and iterate over the resulting array.',
      },
      {
        selector: 'LabeledStatement',
        message: 'Labels are a form of GOTO; using them makes code confusing and hard to maintain and understand.',
      },
      {
        selector: 'WithStatement',
        message: '`with` is disallowed in strict mode because it makes code impossible to predict and optimize.',
      },
    ],
    curly: 'error', // enforces braces for if/for/do/while statements
    'class-methods-use-this': 'off',
  },
};