no-object-as-default-parameter

📝 Disallow the use of objects as default parameters.

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

Default parameters should not be passed to a function through an object literal. The foo = {a: false} parameter works fine if only used with one option. As soon as additional options are added, you risk replacing the whole foo = {a: false, b: true} object when passing only one option: {a: true}. For this reason, object destructuring should be used instead.

Examples

// ❌
function foo({a} = {a: false}) {}

// ✅
function foo(options) {
	const {a} = {a: false, ...options};
}

// ❌
const abc = (foo = {a: false, b: 123}) => {};

// ✅
const foo = ({a = false, b = 123}) => {};

// ✅
const abc = (foo = {}) => {};

// ✅
const abc = (foo = false) => {};