.eslintrc.json

{
    "parserOptions": {
        "ecmaVersion": 8,
        "ecmaFeatures": {
            "experimentalObjectRestSpread": true
        },
        "sourceType": "module"
    },
    "env": {
        "es6": true,
        "node": true,
        "jest": true
    },
    "extends": "airbnb-base",
    "rules": {
        "complexity": ["warn", 10],
        "eqeqeq": ["error", "smart"],
        "semi": ["warn", "always"],
        "indent": ["warn", "tab"],
        "no-tabs": "off",
        "no-use-before-define": ["error", {
            "functions": false,
            "variables": true
        }],
        "no-trailing-spaces": [
            "warn",
            {
                "skipBlankLines": true,
                "ignoreComments": true
            }
        ],
        "comma-dangle": ["error", {
            "arrays": "always-multiline",
            "objects": "always-multiline",
            "imports": "always-multiline",
            "exports": "always-multiline",
            "functions": "never"
        }],
        "no-unused-vars": "warn"
    }
}