.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true,
        "jest/globals": true,
        "node": true
    },
    "extends": [
        "eslint:recommended",
        "plugin:react/recommended"
    ],
    "settings": {
        "react": {
            "createClass": "createReactClass",
            "version": "detect"
        }
    },
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    },
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        },
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "plugins": [
        "react",
        "jest"
    ],
    "rules": {
        "comma-spacing": ["error", { "before": false, "after": true }],
        "object-curly-spacing": ["error", "always"],
        "block-spacing": "error",
        "indent": [
            "error",
            4,
            {
                "SwitchCase": 1
            }
        ],
        "quotes": [
            "error",
            "single"
        ],
        "semi": [
            "error",
            "always"
        ],
        "react/prop-types": 0,
        "react/no-unescaped-entities": 0,
        "space-infix-ops": [
            "error"
        ],
        "vars-on-top": "warn",
        "no-unused-expressions": "warn",
        "eqeqeq": "warn",
        "default-case": "error",
        "max-classes-per-file": "error",
        "no-console": [
            "error",
            {
                "allow": [
                    "warn",
                    "error"
                ]
            }
        ],
        "object-shorthand": "error",
        "eol-last": ["error", "always"],
        "prefer-const": [
            "error",
            {
                "destructuring": "all",
                "ignoreReadBeforeAssign": false
            }
        ],
        "keyword-spacing": [
            "error",
            {
                "before": true,
                "after": true
            }
        ],
        "space-before-blocks":"error",
        "curly": ["error", "all"],
        "brace-style": 2
    }
}