.eslintrc.json

{
    "env": {
        "es6": true,
        "jest": true,
        "node": true
    },
    "extends": [
        "eslint:recommended",
        "plugin:jest/recommended",
        "plugin:jest-formatting/recommended"
    ],
    "plugins": [
        "jest",
        "jest-formatting"
    ],
    "rules": {
        "indent": [
            "error",
            4,
            {
                "SwitchCase": 1
            }
        ],
        "jest/consistent-test-it": [
            "error",
            {
                "fn": "test"
            }
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "max-len": "warn",
        "multiline-ternary": [
            "error",
            "always"
        ],
        "no-await-in-loop": "off",
        "no-bitwise": "off",
        "no-cond-assign": "off",
        "no-console": [
            "error",
            {
                "allow": [
                    "warn",
                    "error"
                ]
            }
        ],
        "no-continue": "off",
        "no-empty": [
            "error",
            {
                "allowEmptyCatch": true
            }
        ],
        "no-mixed-spaces-and-tabs": "error",
        "no-multi-assign": "off",
        "no-param-reassign": "warn",
        "no-plusplus": [
            "error",
            {
                "allowForLoopAfterthoughts": true
            }
        ],
        "no-restricted-syntax": "off",
        "no-underscore-dangle": "off",
        "no-use-before-define": "warn",
        "no-whitespace-before-property": "error",
        "one-var": [
            "error",
            {
                "let": "consecutive"
            }
        ],
        "padding-line-between-statements": [
            "error",
            {
                "blankLine": "always",
                "next": "block-like",
                "prev": "*"
            },
            {
                "blankLine": "any",
                "next": "if",
                "prev": "if"
            }
        ],
        "prefer-const": [
            "error",
            {
                "destructuring": "all"
            }
        ],
        "prefer-destructuring": "warn",
        "quotes": [
            "error",
            "single"
        ],
        "semi": [
            "error",
            "always"
        ],
        "space-in-parens": [
            "error",
            "never"
        ],
        "space-infix-ops": "error",
        "keyword-spacing": "error"
    }
}