.eslintrc.json

{
    "env": {
        "browser": false,
        "commonjs": true,
        "es6": true,
        "node": true
    },
    "extends": "eslint:recommended",
    "parserOptions": {
        "sourceType": "script",
        "ecmaVersion": 2017
    },
    "rules": {
        "no-console": "off",
        "indent": "off",
        "linebreak-style": [
            "warn",
            "unix"
        ],
        "quotes": [
            "warn",
            "single"
        ],
        "semi": [
            "warn",
            "never"
        ],
        "no-const-assign": "warn",
        "no-this-before-super": "warn",
        "no-undef": "error",
        "no-unreachable": "error",
        "no-unused-vars": "warn",
        "constructor-super": "warn",
        "valid-typeof": "warn",
        "no-extra-semi": "warn",
        "no-return-await": "warn",
        "no-extra-parens": "warn"
    }
}