.eslintrc.json

{
    "root": true,
    "env": {
        "es6": true,
        "node": true,
        "mocha": true
    },
    "extends": [
        "eslint:recommended"
    ],
    "rules": {
        "indent": [
            "error",
            4,
            {
                "SwitchCase": 1
            }
        ],
        "no-console": "off",
        "no-var": "error",
        "no-trailing-spaces": "error",
        "prefer-const": "error",
        "quotes": [
            "error",
            "single",
            {
                "avoidEscape": true,
                "allowTemplateLiterals": true
            }
        ],
        "semi": [
            "error",
            "always"
        ]
    },
    "parserOptions": {
        "ecmaVersion": 2018,
        "ecmaFeatures": {
            "jsx": true
        }
    }
}