.eslintrc.js

// https://eslint.org/docs/user-guide/configuring

module.exports = {
  parser: 'babel-eslint',
  parserOptions: {
    sourceType: 'module'
  },
  env: {
    browser: true,
  },
  // https://github.com/standard/standard/blob/master/docs/RULES-en.md
  extends: 'standard',
  // add your custom rules here
  rules: {
    'space-before-function-paren': 0,
    // allow async-await
    'generator-star-spacing': 'off',
    'prefer-const': ['error', {
      'destructuring': 'any',
      'ignoreReadBeforeAssign': false
    }],
    // allow debugger during development
    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
    'no-new': 0,
    'comma-dangle': ['error', {
      'arrays': 'always-multiline',
      'objects': 'always-multiline',
      'imports': 'always-multiline',
      'exports': 'always-multiline',
      'functions': 'ignore',
    }],
    'no-useless-escape': 0
  }
}