.eslintrc.js

module.exports = {
  extends: 'airbnb-base',
  parser: 'babel-eslint',
  parserOptions: {
    ecmaVersion: 6,
    sourceType: 'module',
  },
  env: {
    node: true,
  },
  rules: {
    'consistent-return': 0,
    'import/extensions': 0,
    // does not understand Webpack's aliases
    'import/no-extraneous-dependencies': 0,
    'import/no-unresolved': 0,
    // for consistency sometimes we want to export without default (services)
    'import/prefer-default-export': 0,
    'key-spacing': 0,
    'no-multi-spaces': 0,
    'no-param-reassign': 0,
    quotes: [ 2, 'single' ],
    semi: ["error", "never"],
  },
  overrides: {
    files: ["*.spec.js", "test/**/*.js"],
    env: {
      mocha: true,
    },
    globals: {
      server: true,
      supertest: true,
      expect: true,
      clean: true,
      spy: true,
    },
    rules: {
      // Because of babel-plugin-rewire
      'no-underscore-dangle': 0,
      // It's common to use for-of with await inside for testing many conditions at once
      'no-restricted-syntax': 0,
      'no-await-in-loop': 0,
    }
  }
}