.eslintrc.js

module.exports = {
  env: {
    commonjs: true,
    es6: true,
    node: true,
    'jest/globals': true,
  },
  extends: [
    'eslint:recommended',
    'airbnb-base',
  ],
  plugins: ['jest'],
  globals: {
    Atomics: 'readonly',
    SharedArrayBuffer: 'readonly',
  },
  parserOptions: {
    ecmaVersion: 2018,
  },
  rules: {
    indent: [
      'error',
      2,
    ],
    'linebreak-style': [
      'error',
      'unix',
    ],
    quotes: [
      'error',
      'single',
    ],
    semi: [
      'error',
      'always',
    ],
    'global-require': 0,
    'no-underscore-dangle': 0,
    'import/order': 0,
    camelcase: 0,
    'no-param-reassign': 0,
    'no-use-before-define': 0,
    'no-plusplus': 0,
    'no-restricted-syntax': 0,
    'no-continue': 0,
    'arrow-parens': ['error', 'as-needed'],
    'no-mixed-operators': 0,
    'jest/no-disabled-tests': 'warn',
    'jest/no-focused-tests': 'error',
    'jest/no-identical-title': 'error',
    'jest/prefer-to-have-length': 'warn',
    'jest/valid-expect': 'error',
  },
};