.eslintrc.json

{
  "root": true,
  "extends": "eslint:recommended",
  "env": {
    "es6": true,
    "node": true,
    "browser": true
  },
  "parser": "@babel/eslint-parser",
  "plugins": [
    "react"
  ],
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "requireConfigFile": false
  },
  "rules": {
    "indent": ["error", 2, { "SwitchCase": 1 }],
    "linebreak-style": ["error", "unix"],
    "no-trailing-spaces": 2,
    "eol-last": 2,
    "space-in-parens": ["error", "never"],
    "no-multiple-empty-lines": 1,
    "prefer-const": "error",
    "space-infix-ops": "error",
    "no-useless-escape": "off",
    "require-atomic-updates": "off",
    "react/jsx-uses-vars": 1,
    "react/jsx-uses-react": 1,
    "react/react-in-jsx-scope": 1,
    "no-console": 0,
    "no-case-declarations": 0,
    "quotes": ["error", "single"],
    "no-var": "error",
    "no-prototype-builtins": "off",
    "curly": ["error", "all"]
  }
}