.eslintrc.json

{
    "env": {
        "es6": true,
        "node": true,
        "mongo": true
    },
    "extends": "eslint:recommended",
    "parserOptions": {
        "ecmaVersion": 8,
        "sourceType": "module"
    },
    "rules": {
        "indent": [
            "error",
            4,
            { 
                "SwitchCase": 1 
            }
        ],
        "linebreak-style": ["error", "unix"],
        "quotes": [
            "error",
            "single",
            { "avoidEscape": true, "allowTemplateLiterals": true }
        ],
        "semi": ["error", "always"],
        "no-irregular-whitespace": [
            "error",
            {
                "skipStrings": true,
                "skipComments": true,
                "skipRegExps": true,
                "skipTemplates": true
            }
        ],
        
        "no-console": [
            "error",
            {
                "allow": [
                    "log",
                    "warn",
                    "error",
                    "time",
                    "timeEnd"
                ]
            }
        ],
        "prefer-const": ["error"],
        "no-var": ["error"],
        "no-use-before-define": [
            "error",
            {
                "functions": true,
                "classes": true,
                "variables": true
            }
        ],
        "no-case-declarations": ["error"],

        "accessor-pairs": "warn",
		"array-callback-return": "error",
		"dot-location": ["error", "property"],
		"dot-notation": "error",
		"eqeqeq": "error",
		"no-empty-function": "error",
		"no-floating-decimal": "error",
		"no-implied-eval": "error",
		"no-invalid-this": "error",
		"no-lone-blocks": "error",
		"no-new-func": "error",
		"no-new-wrappers": "error",
		"no-new": "error",
		"no-octal-escape": "error",
		"no-return-assign": "error",
		"no-self-compare": "error",
		"no-sequences": "error",
		"no-throw-literal": "error",
		"no-unmodified-loop-condition": "error",
		"no-useless-call": "error",
		"no-useless-escape": "error",
		"no-void": "error",
		"wrap-iife": "error",
        "yoda": "error",

        "callback-return": "error",
        "handle-callback-err": "error",

        "array-bracket-spacing": "error",
		"block-spacing": "error",
		"brace-style": ["error", "1tbs", { "allowSingleLine": true }],
		"comma-dangle": ["error", "always-multiline"],
		"comma-spacing": "error",
		"comma-style": "error",
		"computed-property-spacing": "error",
		"consistent-this": ["error", "$this"],
		"eol-last": "error",
		"keyword-spacing": "error",
        "max-depth": "error",

        "max-nested-callbacks": ["error", { "max": 4 }],
		"max-statements-per-line": ["error", { "max": 2 }],
		"new-cap": "error",
		"newline-per-chained-call": ["error", { "ignoreChainWithDepth": 3 }],
        "no-array-constructor": "error",
        "no-lonely-if": "error",
		"no-mixed-operators": "error",
		"no-new-object": "error",
		"no-spaced-func": "error",
		"no-trailing-spaces": "error",
		"no-unneeded-ternary": "error",
		"no-whitespace-before-property": "error",
		"object-curly-spacing": ["error", "always"],
		"operator-assignment": "error",
		"operator-linebreak": ["error", "before"],
		"padded-blocks": ["error", "never"],
        "quote-props": ["error", "as-needed"],

        "no-mixed-spaces-and-tabs": ["error", "smart-tabs"],
        "semi-spacing": "error",
		"space-before-blocks": "error",
		"space-before-function-paren": ["error", "never"],
		"space-in-parens": "error",
		"space-infix-ops": "error",
		"space-unary-ops": "error",
        "spaced-comment": ["error", "always"],
        "yield-star-spacing": ["error", "after"],
        "unicode-bom": "error",
        "arrow-spacing": "error",

        "object-shorthand": "error",
        "arrow-body-style": "error",
		"no-duplicate-imports": "error",
		"no-useless-computed-key": "error",
		"no-useless-constructor": "error",
		"prefer-arrow-callback": "error",
		"prefer-rest-params": "error",
		"prefer-spread": "error",
		"rest-spread-spacing": "error",
        "template-curly-spacing": "error"
    }
}