.eslintrc.json

{
    "env": {
        "es2020": true,
        "node": true,
        "jest": true
    },
    "extends": ["eslint:recommended", "prettier", "plugin:unicorn/recommended"],
    "rules": {
        "no-console": "error",
        "curly": ["error", "all"],
        "prefer-arrow-callback": "error",
        "one-var": ["error", "never"],
        "no-var": "error",
        "prefer-const": "error",
        "object-shorthand": "error",
        "prefer-destructuring": [
            "error",
            {
                "object": true,
                "array": false
            }
        ],
        "prefer-template": "error",
        "arrow-body-style": ["error", "as-needed"],

        "unicorn/no-null": "off",
        "unicorn/prevent-abbreviations": "off",
        "unicorn/prefer-string-slice": "off",
        "unicorn/prefer-code-point": "off",
        "unicorn/no-array-push-push": "off",
        "unicorn/no-array-reduce": "off",
        "unicorn/no-for-loop": "off",
        "unicorn/consistent-destructuring": "off",
        "unicorn/prefer-switch": ["error", { "emptyDefaultCase": "do-nothing-comment" }]
    },
    "parserOptions": {
        "sourceType": "module"
    },
    "overrides": [
        {
            "files": "*.ts",
            "extends": [
                "plugin:@typescript-eslint/eslint-recommended",
                "plugin:@typescript-eslint/recommended",
                "prettier"
            ],
            "rules": {
                "@typescript-eslint/no-non-null-assertion": "warn",
                "@typescript-eslint/no-explicit-any": "warn",
                "@typescript-eslint/explicit-function-return-type": "error",

                "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }]
            }
        }
    ]
}