.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true,
        "mocha": true
    },
    "extends": ["eslint:recommended", "plugin:node/recommended"],
    "plugins": ["node"],
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 8 // or 2017
    },
    "rules": {
        "camelcase": "error",
        "comma-spacing": [
          "error", {"before": false, "after": true}
        ],
        "indent": [
            "error",
            "tab"
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "no-unused-vars": [
          "warn"
        ],
        "no-console": "off",
        "node/no-unsupported-features": [
          "off",
          {"version": 7}
        ],
        "quotes": [
            "error",
            "single"
        ],
        "semi": [
            "error",
            "always"
        ]
    }
}