.eslintrc.js

module.exports = {
  extends: ['standard'],
  plugins: ['standard', 'react'],
  rules: {
    'no-var': 'error', // optional, recommended when using es6+
    'no-unused-vars': 1, // recommended
    'arrow-spacing': ['error', { 'before': true, 'after': true }], // recommended
    'indent': ['error', 2],
    'comma-dangle': ['error', {
      'objects': 'only-multiline',
      'arrays': 'only-multiline',
      'imports': 'never',
      'exports': 'never',
      'functions': 'never'
    }],
    "strict": ["never"],

    // options to emulate prettier setup
    'semi': ['error', 'never'],
    'max-len': ['error', { 'code': 80 }],
    'template-curly-spacing': ['error', 'always'],
    'arrow-parens': ['error', 'as-needed'],

    // standard.js
    'space-before-function-paren': ['error', {
      'named': 'always',
      'anonymous': 'always',
      'asyncArrow': 'always'
    }],

    // standard plugin - options
    'standard/object-curly-even-spacing': ['error', 'either'],
    'standard/array-bracket-even-spacing': ['error', 'either'],
    'standard/computed-property-even-spacing': ['error', 'even'],
    'standard/no-callback-literal': ['error', ['cb', 'callback']],

    // react plugin - options
    'react/jsx-uses-react': 'error',
    'react/jsx-uses-vars': 'error'
  },
  parser: 'babel-eslint',
  parserOptions: {
    'ecmaVersion': 8, // optional, recommended 6+
  }
}