JS Practice — Built-in Objects

Set symmetricDifference() — size

📖 Usage Example

const a = new Set([1, 2, 3])
const b = new Set([2, 3, 4])
const sym = a.symmetricDifference(b)
console.log([...sym]) // → [1, 4]

Use Set.symmetricDifference() to get elements in either set but not in both.

Set.prototype.symmetricDifference() (ES2025)

Verify the size of the symmetric difference.

Challenge: Verify size of symmetric difference.

💡 Hints (1)