unicorn/no-useless-fallback-in-spread Correctness

✅ This rule is turned on by default.

🛠️ An auto-fix is available for this rule for some violations.

What it does

Disallow useless fallback when spreading in object literals.

Why is this bad?

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

Examples

Examples of incorrect code for this rule:

const object = { ...(foo || {}) };

Examples of correct code for this rule:

const object = { ...foo };
const object = { ...(foo || { not: "empty" }) };

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)

{
  "rules": {
    "unicorn/no-useless-fallback-in-spread": "error"
  }
}

CLI

oxlint --deny unicorn/no-useless-fallback-in-spread

References

• Rule Source