.eslintrc

{
  'parser': 'babel-eslint',
  'plugins': [
    'react'
  ],
  'env': {
    'browser': true,
     'node': true,
     'es6': true
  },
  'globals': {
        'React': true
    },
  'ecmaFeatures': {
      'jsx': true
  },
  'rules': {
    # Error rules
    'no-dupe-args': 2,
    'no-dupe-keys': 2,
    'no-empty': 2,
    'no-extra-parens': 1,
    'no-extra-semi': 1,
    'no-irregular-whitespace': 1,
    # Best Practices rules
    'array-callback-return': 1,
    'block-scoped-var': 1,
    'curly': [ 2, 'all' ],
    'default-case': 2,
    'dot-notation': [ 1, {
      'allowKeywords': false,
      'allowPattern': '^[a-z]+(_[a-z]+)+$'
    }],
    'no-caller': 2,
    'no-else-return': 1,
    'no-empty-function': 1,
    'no-empty-pattern': 1,
    'no-extra-bind': 1,
    'no-multi-spaces': [ 1, {
      'exceptions': {
        'Property': true
      }
    }],
    'no-useless-return': 1,
    'vars-on-top': 2,
    # Stylistic rules
    'array-bracket-spacing': [ 1, 'always' ],
    'block-spacing': 1,
    'brace-style': 2,
    'camelcase': 2,
    'comma-style': 1,
    'computed-property-spacing': 1,
    'indent': [ 1, 2 ],
    'jsx-quotes': [ 1, 'prefer-single' ],
    'key-spacing': 2,
    'newline-after-var': [ 1, 'always' ],
    'newline-before-return': 1,
    'no-mixed-spaces-and-tabs': [ 2, 'smart-tabs' ],
    'no-multiple-empty-lines': 1,
    'no-trailing-spaces': 1,
    'object-curly-spacing': [ 2, 'always' ],
    'object-property-newline': 1,
    'padded-blocks': [ 0, 'always' ],
    'space-before-function-paren': [ 1, 'always' ],
    'space-in-parens': [ 2, 'always' ],
    'spaced-comment': [ 1, 'always' ],
    # ES6 rules
    'arrow-spacing': [ 1, {
      'before': true,
      'after': true
    }],
    'no-duplicate-imports': 1,
    'no-var': 2,
    'prefer-arrow-callback': 1,
    'prefer-const': [ 1, {
      'destructuring': 'any'
    }]
  }
}