.eslintrc.js

module.exports = {
  root: true,
  env: {
    browser: true,
    node: true,
  },
  plugins: [],
  extends: [
    'eslint:recommended',
    'airbnb-base',
  ],
  rules: {
    // override/add rules settings here, such as:
    'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
    'class-methods-use-this': [0],
    quotes: ['warn', 'single'],
    'no-multiple-empty-lines': ['error', {
      max: 2,
    }],
    'no-unexpected-multiline': 'warn',
    'no-extra-semi': 'error',
    'no-underscore-dangle': 0,
    'prefer-const': ['error'],
    'getter-return': ['error'],
    'object-curly-spacing': 2,
    'object-curly-newline': ['error', {
      ObjectExpression: 'always',
      ObjectPattern: {
        multiline: true,
      },
      ImportDeclaration: 'never',
      ExportDeclaration: {
        multiline: true, minProperties: 3,
      },
    }],
  },
  parser: 'babel-eslint',
  parserOptions: {
    ecmaVersion: 6,
    sourceType: 'module',
  },
};