.eslintrc.json

{
    "env": {
        "es6": true,
        "node": true
    },
    "extends": "eslint:recommended",
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 6,
        "ecmaFeatures": {
            "jsx": false
        },
        "ignore": [
            "*.min.js"
        ]
    },
    "rules": {
        "no-console": 0,
        "global-require": "off",
        "quotes": [
            "warn",
            "single",
            {
                "avoidEscape": true,
                "allowTemplateLiterals": true
            }
        ],
        "semi": "warn",
        "indent": "error",
        "no-unsafe-negation": "error",
        "eqeqeq": [
            "warn",
            "always",
            {
                "null": "ignore"
            }
        ],
        "no-alert": "error",
        "no-useless-return": "error",
        "array-bracket-spacing": "error",
        "brace-style": [
            "error",
            "1tbs",
            {
                "allowSingleLine": true
            }
        ],
        "comma-dangle": "error",
        "comma-spacing": "error",
        "comma-style": "error",
        "computed-property-spacing": "error",
        "func-call-spacing": "error",
        "key-spacing": "error",
        "keyword-spacing": [
            "error",
            {
                "overrides": {
                    "catch": {
                        "after": false
                    }
                }
            }
        ],
        "new-parens": "error",
        "no-array-constructor": "warn",
        "no-new-object": "warn",
        "no-whitespace-before-property": "error",
        "object-curly-spacing": "error",
        "one-var-declaration-per-line": "error",
        "quote-props": [
            "error",
            "as-needed"
        ],
        "semi-spacing": "error",
        "space-before-blocks": [
            "error",
            "always"
        ],
        "space-before-function-paren": [
            "error",
            "never"
        ],
        "space-in-parens": "error",
        "space-unary-ops": [
            "error",
            {
                "words": true,
                "nonwords": false
            }
        ],
        "arrow-parens": [
            "warn",
            "as-needed"
        ],
        "arrow-spacing": "error",
        "no-useless-rename": "error",
        "prefer-arrow-callback": "error",
        "template-curly-spacing": "error",
        "valid-jsdoc": [
            "warn",
            {
                "prefer": {
                    "return": "returns",
                    "arg": "param",
                    "argument": "param",
                    "augments": "extends",
                    "property": "prop"
                },
                "preferType": {
                    "object": "Object",
                    "string": "String",
                    "number": "Number",
                    "boolean": "Boolean",
                    "promise": "Promise",
                    "array": "Array",
                    "undefined": " Undefined",
                    "null": "Null",
                    "function": "Function"
                },
                "requireReturn": false
            }
        ]
    }
}