.eslintrc.json

{
    "root": true,
    "parserOptions": {
        "ecmaFeatures": {
            "experimentalObjectRestSpread": true
        },
        "ecmaVersion": 6,
        "sourceType": "module"
    },
    "env": {
        "browser": true,
        "commonjs": true,
        "es6": true
    },
    "extends": "eslint:recommended",
    "rules": {
        "indent": ["error", 4, {
            "SwitchCase": 1
        }],
        "no-undef": "off",
        "no-console": "off",
        "quotes": ["error", "single"],
        "semi": ["error", "always"]
    }
}