.eslintrc.json

{
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": "latest",
    "sourceType": "module"
  },
  "parser": "babel-eslint",
  "globals": {
    "process": true
  },
  "env": {
    "es6": true,
    "browser": true,
    "jest": true
  },
  "plugins": [
    "babel",
    "react"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended"
  ],
  "rules": {
    "no-console": "warn",
    "indent": [
      "error",
      2,
      {
        "SwitchCase": 1
      }
    ],
    "quotes": [
      "error",
      "single"
    ],
    "semi": [
      "error",
      "always"
    ],
    "space-in-parens": [
      "error"
    ],
    "space-infix-ops": "error",
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "comma-spacing": "error",
    "space-before-function-paren": [
      "error",
      {
        "asyncArrow": "always",
        "anonymous": "never",
        "named": "never"
      }
    ],
    "eol-last": [
      "error",
      "always"
    ],
    "arrow-spacing": [
      "error",
      {
        "before": true,
        "after": true
      }
    ],
    "array-bracket-spacing": "error",
    "prefer-const": "error",
    "no-var": "error",
    "rest-spread-spacing": "error",
    "prefer-arrow-callback": "error",
    "object-shorthand": [
      "error",
      "always"
    ],
    "max-len": "error",
    "jsx-quotes": "error",
    "babel/no-invalid-this": 1,
    "babel/semi": 0,
    "react/jsx-uses-react": "off",
    "react/react-in-jsx-scope": "off"
  }
}