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.

Disallow useless fallback when spreading in object literals.

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

Examples of incorrect code for this rule:

javascript

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

Examples of correct code for this rule:

javascript

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)Config (oxlint.config.ts)CLI

json

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

import { defineConfig } from "oxlint";

export default defineConfig({
  rules: {
    "unicorn/no-useless-fallback-in-spread": "error",
  },
});

bash

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

This rule was added in v0.0.16.