.eslintrc.json

{
  "env": {
    "browser": true,
    "node": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended",
    "react-app"
  ],
  "overrides": [
    {
      "files": [
        "styles.js"
      ],
      "rules": {
      "max-lines-per-function": "off",
        "sort-keys": "off"
      }
    }
  ],
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 7,
    "sourceType": "module"
  },
  "plugins": [
    "react"
  ],
  "rules": {
    "array-bracket-spacing": "warn",
    "comma-dangle": ["warn", "always-multiline"],
    "complexity": ["error", 5],
    "eol-last": "error",
    "eqeqeq": "error",
    "func-style": ["error", "expression"],
    "indent": ["warn", 2],
    "keyword-spacing": "warn",
    "max-len": ["warn", {
      "code": 180,
      "ignoreStrings": true
    }],
    "max-lines-per-function": ["error", 100],
    "multiline-comment-style": ["warn", "starred-block"],
    "no-console": "warn",
    "no-dupe-keys": "error",
    "no-duplicate-imports": "warn",
    "no-floating-decimal": "warn",
    "no-trailing-spaces": "warn",
    "no-unreachable": "warn",
    "no-unused-vars": "warn",
    "no-var": "error",
    "no-whitespace-before-property": "warn",
    "object-curly-spacing": ["warn", "always", {
      "arraysInObjects": false,
      "objectsInObjects": false
    }],
    "prefer-const": "error",
    "react/prop-types": "off",
    "require-await": "error",
    "sort-vars": ["warn", { "ignoreCase": true }],
    "spaced-comment": ["warn", "always", { "exceptions": ["*"] }],
    "space-in-parens": "warn",
    "yoda": ["warn", "never", { "exceptRange": true }]
  },
  "settings": {
    "react": {
      "version": "detect"
    }
  }
}