.eslintrc.json

{
  "env": {
    "node": true,
    "browser": true,
    "es6": true,
    "jest": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended"
  ],
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 2018,
    "sourceType": "module"
  },
  "plugins": [
    "react"
  ],
  "rules": {
    "indent": [
      "error",
      2,
      {
        "SwitchCase": 1
      }
    ],
    "keyword-spacing": [
      "error"
    ],
    "key-spacing": [
      "error"
    ],
    "space-before-blocks": [
      "error"
    ],
    "space-before-function-paren": [
      "error",
      "never"
    ],
    "func-call-spacing": [
      "error"
    ],
    "func-style": [
      "warn",
      "expression"
    ],
    "space-in-parens": [
      "error"
    ],
    "max-params": [
      "warn"
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "semi": [
      "error"
    ],
    "semi-spacing": [
      "error"
    ],
    "semi-style": [
      "error"
    ],
    "switch-colon-spacing": [
      "error"
    ],
    "camelcase": [
      "warn",
      {
        "properties": "always"
      }
    ],
    "eol-last": [
      "error",
      "always"
    ]
  }
}