no-useless-fallback-in-spread.md

Disallow useless fallback when spreading in object literals

💼 This rule is enabled in the following configs: ✅ recommended, ☑️ unopinionated.

🔧 This rule is automatically fixable by the --fix CLI option.

Spreading falsy values in object literals won't add any unexpected properties, so it's unnecessary to add an empty object as fallback.

Examples

// ❌
const object = {...(foo || {})};

// ❌
const object = {...(foo ?? {})};

// ✅
const object = {...foo};

// ✅
const object = {...(foo && {})};

// ✅
const array = [...(foo || [])];