.eslintrc.json

{
    "env": {
        "browser": true,
        "es2021": true
    },
    "extends": "eslint:recommended",
    "parserOptions": {
        "ecmaVersion": 12,
        "sourceType": "module"
    },
    "rules": {
        "indent": [
            "error",
            4
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "template-curly-spacing": ["error", "never"],
        "semi-style": ["error", "last"],
        "semi": ["error", "always"],
        "quotes": ["error", "single", 
            {"avoidEscape": true}
        ],
        "prefer-template": ["error"],
        "prefer-const": ["error"],
        "prefer-arrow-callback": ["error"],
        "no-var": ["error"],
        "no-trailing-spaces": ["error"],
        "keyword-spacing": [
            "error", 
            {"before": true, "after": true}
        ],
        "brace-style": [
            "error", 
            "1tbs", 
            { "allowSingleLine": true }
        ],
        "block-spacing": "error"
    }
}