.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es2021: true,
    jest: true,
  },
  extends: ['plugin:@typescript-eslint/recommended', 'airbnb-base', 'prettier'],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 13,
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint'],
  rules: {
    '@typescript-eslint/no-unused-vars': 'error',
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        jsx: 'never',
        ts: 'never',
        tsx: 'never',
      },
    ],
    'no-useless-escape': 'warn',
    'no-promise-executor-return': 'warn',
    'no-constructor-return': 'warn',
    '@typescript-eslint/ban-ts-comment': 'warn',
  },
  settings: {
    'import/resolver': {
      typescript: {}, // this loads <rootdir>/tsconfig.json to eslint
    },
  },
};