.eslintrc.js

// $ cat .eslintrc.js
module.exports = {
  parser: 'babel-eslint',
  env: {
    browser: true,
    meteor: true,
    node: true,
    es6: true
  },
  extends: 'eslint:recommended',
  parserOptions: {
    ecmaFeatures: {
      jsx: true
    },
    sourceType: 'module'
  },
  plugins: ['react'],
  rules: {
    indent: ["error",2, 4],
    'linebreak-style': [2, 'unix'],
    quotes: [2, 'single'],
    semi: [2, 'never'],
    'brace-style': [2, '1tbs'],
    'array-bracket-spacing': [2, 'never'],
    camelcase: [2, { properties: 'always' }],
    'keyword-spacing': [2],
    'eol-last': [2],
    'no-trailing-spaces': [2]
  },
  globals: {
    // Collections
    Persons: true,
    Modules: true,

    // More stuff
    // [...]

    // Packages
    lodash: true,
    i18n: true,
    moment: true,
    Messenger: true
  }
};